________________________________________________

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported)

~~May~~October 83, 2007

GSR Mortgage Loan Trust 2007-OA1

(Exact Name of Issuing Entity)

GS Mortgage Securities Corp.

(Exact Name of Depositor as Specified in its Charter)

GS Mortgage Securities Corp.

(Exact Name of Registrant as Specified in its Charter)

Goldman Sachs Mortgage Company

(Exact Name of Sponsor as Specified in its Charter)

Delaware	333-139817	13-3387389
(State or Other Jurisdiction Of Incorporation)	(Commission File Number)	(I.R.S. Employer Identification No.)
85 Broad Street New York, New York		10004
(Address of Principal Executive Offices)		(Zip Code)

Registrant’s telephone number, including area code: (212) 902-1000

None

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 86.0102. ~~Other~~Change ~~Events~~of Servicer or Trustee.

~~The~~On ~~Registrant~~May ~~registered offerings of Mortgage Pass-Through Certificates~~8, ~~Series~~ 2007~~-OA1~~ ~~on a delayed or continuous basis pursuant to Rule 415 under~~ (the ~~Securities~~ ~~Act~~“Closing ~~of 1933~~Date”), asGSR ~~amended,~~Mortgage byLoan aTrust ~~Registration Statement on Form S~~2007-~~3 (Registration~~OA1 ~~File No. 333-139817)~~ (the “~~Registration Statement~~Issuing Entity”). ~~Pursuant to the Registration Statement, the Registrant~~ issued ~~$1,143,744,300 aggregate~~and ~~principal~~sold ~~amount~~Mortgage ~~of the Class 1A~~Pass-1,Through ~~Class 1A-2~~Certificates, ~~Class~~Series 2A2007-1,OA1. ~~Class~~As ~~2A-2,~~of ~~Class~~the ~~2A-3A,~~Closing ~~Class 2A-3B~~Date, ~~Class~~Homecomings ~~2A-4~~Financial, ~~Class~~LLC ~~2A-M, Class M-1, Class M-2, Class M-3, Class M-4, Class M-5, Class M-6, Class M-7, Class M-8, Class M-9, Class R, Class RC and Class RX Certificates~~ (~~the~~ “~~Publicly Offered Certificates~~Homecomings”) onacted ~~May 8, 2007. This Current Report on Form 8-K is being filed to satisfy an undertaking, contained in the definitive Prospectus dated February 13, 2007,~~ as ~~supplemented by the Prospectus Supplement dated May 7, 2007, to~~ ~~file~~subservicer ~~a copy~~ of ~~the~~approximately ~~Trust~~12.89% ~~Agreement~~by ~~(as~~principal ~~defined~~balance ~~below) and other operative agreements executed in connection with the issuance~~ of the ~~Publicly~~mortgage ~~Offered~~loans ~~Certificates,~~owned aby ~~form of which was filed as an exhibit to~~ the ~~Registration Statement~~Issuing Entity.

~~The~~Residential ~~Publicly~~Capital, ~~Offered~~LLC ~~Certificates were issued pursuant to a Master Servicing and Trust Agreement~~ (~~the~~ “~~Trust Agreement~~ResCap”), ~~a substantially final form of~~ which isowns ~~attached~~indirectly ~~hereto~~all ~~as Exhibit 4.5, dated as~~ of ~~April 1, 2007, among GS Mortgage Securities Corp., as depositor (in such capacity,~~ the ~~“Depositor”),~~equity ~~Wells~~of ~~Fargo Bank, N.A., as securities~~both ~~administrator~~Homecomings and ~~master~~GMAC ~~servicer~~Mortgage, ~~U.S. Bank~~ ~~National~~LLC ~~Association, as a custodian, and Deutsche Bank National Trust Company, as trustee~~ (~~in such capacity, the~~ “~~Trustee~~GMACM”), ~~and~~has asrestructured ~~a custodian. The “Certificates” consist of~~ the ~~Publicly~~operations ~~Offered Certificates and the Class M-10~~of Homecomings and ~~Class XP Certificates~~GMACM. ~~The Certificates~~ ~~evidence~~As ~~all of the beneficial ownership interest in~~ a ~~trust~~result ~~fund that consists primarily~~ of asuch ~~pool consisting of two groups of payment-option or hybrid payment-option~~restructuring, ~~adjustable~~on ~~rate~~September ~~mortgage loans with a negative~~24, ~~amortization feature with an aggregate outstanding principal balance of approximately $1~~2007,~~152,968,074 as~~ ~~of April~~Homecomings 1,transferred ~~2007,~~its ~~together~~servicing ~~with~~platform and certain ~~other~~employees ~~assets. Capitalized terms used herein~~responsible ~~and~~for ~~not otherwise defined shall have~~ the ~~meanings~~servicing ~~assigned~~function to ~~them~~its inaffiliate ~~the Trust Agreement~~GMACM.

~~Sales~~Subsequent to the transfer of the servicing platform and employees from Homecomings to ~~Securities~~GMACM, ~~and~~GMACM ~~Use~~became the subservicer for all of ~~Proceeds~~the mortgage loans formerly serviced by Homecomings. In addition, GMACM will be servicing all of the GMACM and Homecomings servicing portfolios, which will consist of the aggregate of the amounts set forth below under the headings “GMAC Mortgage LLC Primary Servicing Portfolio” and “Homecomings Financial, LLC Servicing Portfolio.”

~~On May~~GMACM 8is a Delaware limited liability company and a wholly-owned subsidiary of GMAC Residential Holding Company, ~~2007~~LLC, ~~the~~which ~~following~~is ~~classes~~a wholly owned subsidiary of ~~certificates~~ResCap. ResCap inis ~~the~~a ~~following~~Delaware ~~amounts~~limited ~~were~~liability company and a wholly-owned subsidiary ~~sold~~of GMAC byMortgage ~~the~~Group, ~~registrant~~LLC, inwhich ~~private~~is ~~placements~~a inwholly-owned ~~reliance~~subsidiary onof ~~Section~~GMAC ~~4(2)~~LLC. ofOn ~~the~~August 24, 2007, Fitch Ratings reduced GMACM’s residential primary subservicer ~~Securities~~rating ~~Act~~and ofresidential ~~1933:~~primary servicer rating for Alt-A product from RPS1 to RPS1- and placed the servicer ratings on Rating Watch Negative.

Class	Initial Principal Balance
Class M10	$2,882,000
Class XP	$6,341,774

GMACM began acquiring, originating and servicing residential mortgage loans in 1985 through its acquisition of Colonial Mortgage Service Company, which was formed in 1926, and the loan administration, servicing operations and portfolio of Norwest Mortgage, which entered the residential mortgage loan business in 1906. These businesses formed the original basis of what is now GMACM.

~~The~~GMACM ~~net proceeds~~maintains ~~from~~its ~~the~~executive ~~sale~~and ofprincipal ~~these~~offices ~~certificates~~at ~~were~~1100 ~~applied~~Virginia byDrive, ~~the registrant~~Fort ~~toward~~Washington, ~~the~~Pennsylvania ~~purchase~~19034. ofIts ~~the~~telephone ~~mortgage~~number ~~loans~~is ~~constituting the pool~~(215) ~~assets~~734-5000.

~~Item~~In 9addition, GMACM purchases mortgage loans originated by GMAC Bank, which is wholly-owned by IB Finance Holding Company, LLC, a subsidiary of ResCap and GMAC LLC, and which is an affiliate of GMACM.01 Formerly known as GMAC Automotive Bank, GMAC Bank, a Utah industrial bank was organized in 2001. ~~Financial~~As of November 22, ~~Statements~~2006, GMAC Bank became the successor to substantially all of the assets and liabilities ~~Exhibits~~of GMAC Bank, a federal savings bank.

(GMACM generally retains the servicing rights with respect to loans it sells or securitizes, and also occasionally purchases mortgage servicing rights from other servicers or acts as a) ~~Not~~subservicer ~~applicable~~of mortgage loans (and does not hold the corresponding mortgage servicing right asset).

As of the six months ended June 30, 2007, GMACM acted as primary servicer and owned the corresponding servicing rights on approximately 2,271,474 of residential mortgage loans having an aggregate unpaid principal balance of approximately $284 billion, and GMACM acted as subservicer (band did not own the corresponding servicing rights) ~~Not~~on ~~applicable~~approximately 334,864 loans having an aggregate unpaid principal balance of over $70.5 billion.

The following tables set forth the dollar amount of mortgage loans serviced by GMACM for the periods indicated, and the number of such loans for the same period. GMACM was the servicer of a residential mortgage loan portfolio of approximately $153.6 billion, $13.9 billion, $17.6 billion and $7.0 billion during the year ended December 31, 2003 backed by prime conforming mortgage loans, prime non-conforming mortgage loans, government mortgage loans and second-lien mortgage loans (cincluding home equity lines of credit), ~~Exhibits:~~respectively. GMACM was the servicer of a residential mortgage loan portfolio of approximately $211.5 billion, $32.0 billion, $18.2 billion and $22.8 billion during the six months ended June 30, 2007 backed by prime conforming mortgage loans, prime non-conforming mortgage loans, government mortgage loans and second-lien mortgage loans (including home equity lines of credit), respectively. The percentages shown under “Percentage Change from Prior Year” represent the ratio of (a) the difference between the current and prior year volume over (b) the prior year volume.

~~4.5 Master Servicing and Trust Agreement dated as of April 1~~GMAC MORTGAGE, ~~2007,~~LLC ~~among~~PRIMARY GSSERVICING Mortgage Securities Corp., as depositor (the “Depositor”), Wells Fargo Bank, N.A. as securities administrator and master servicer (in such capacity, the “Master Servicer”), U.S. Bank National Association, as a custodian, and Deutsche Bank National Trust Company, as Trustee and a as custodian (“Trustee”)PORTFOLIO

~~99.1 Flow Servicing Agreement dated as of January 1, 2006, between Goldman Sachs Mortgage Corporation~~ (~~“GSMC”),~~$ IN ~~as owner, and Avelo Mortgage, L.L.C. (“Avelo”~~MILLIONS)~~, as servicer~~

99.2 Master Mortgage Loan Purchase Agreement dated as of July 1, 2004 between GSMC, as purchaser, and Countrywide Home Loans, Inc. (“Countrywide”), as seller

	Year Ended December 31,								Six Months Ended June 30,
	2003		2004		2005		2006		2007
Prime conforming mortgage loans
No. of Loans		1,308,284		1,323,249		1,392,870		1,455,919		1,485,410
Dollar Amount of Loans	$	153,601	$	165,521	$	186,364	$	203,894	$	211,462
Percentage Change from Prior Year		2.11%		7.76%		12.59%		9.41%
Prime non-conforming mortgage loans
No. of Loans		34,041		53,119		69,488		67,462		68,062
Dollar Amount of Loans	$	13,937	$	23,604	$	32,385	$	32,220	$	32,035
Percentage Change from Prior Year		11.12%		69.36%		37.20%		(0.51)%
Government mortgage loans
No. of Loans		191,023		191,844		181,679		181,563		175,588
Dollar Amount of Loans	$	17,594	$	18,328	$	18,098	$	18,843	$	18,166
Percentage Change from Prior Year		(16.91)%		4.17%		(1.25)%		4.12%
Second-lien mortgage loans
No. of Loans		282,128		350,334		392,261		514,085		542,414
Dollar Amount of Loans	$	7,023	$	10,374	$	13,034	$	20,998	$	22,778
Percentage Change from Prior Year		5.36%		47.71%		25.64%		61.10%
Total mortgage loans serviced
No. of Loans		1,815,476		1,918,546		2,036,298		2,219,029		2,271,474
Dollar Amount of Loans	$	192,155	$	217,827	$	249,881	$	275,955		284,441
Percentage Change from Prior Year		0.71%		13.36%		14.72%		10.43%

~~99.3 Servicing Agreement dated as of July 1~~HOMECOMINGS FINANCIAL, ~~2004,~~LLC ~~between~~SERVICING ~~GSMC, as purchaser, and Countrywide Home Loans Servicing LP (“Countrywide Servicing”), as servicer~~PORTFOLIO

~~99.4~~The following ~~Amendment~~table ~~Reg~~sets ~~AB,~~forth ~~dated~~the asaggregate ofprincipal ~~January~~amount 1,of ~~2006,~~mortgage toloans serviced ~~the~~by ~~Master~~Homecomings ~~Mortgage~~for ~~Loan~~the ~~Purchase~~past ~~Agreement~~five years and for the ~~Servicing~~six ~~Agreement~~months ~~each~~ended June ~~dated~~30, as2007. ofThe ~~July~~percentages 1,shown ~~2004~~under ~~between~~“Percentage ~~GSMC,~~Change asfrom ~~purchaser,~~Prior Year” represent the ratio of (a) the difference between the current and ~~Countrywide~~prior year volume over (b) the prior year volume.

~~99.5~~First Lien ~~Standard~~Mortgage ~~Terms and Provisions of Sale and Servicing Agreement dated as of September 29, 2005 between GSMC and Residential Funding Company, LLC (“RFC”)~~Loans

99.6 Assignment, Assumption and Recognition Agreement, dated as of April 1, 2007, among the Depositor, GSMC and Avelo, as servicer

	Year Ended December 31,										Six Months Ended June 30,
Volume by Principal Balance	2002		2003		2004		2005		2006		2007
Prime Mortgages⁽¹⁾	$	27,343,774,000	$	29,954,139,212	$	31,943,811,060	$	44,570,851,126	$	67,401,832,594	$	72,144,802,385
Non-Prime Mortgages⁽²⁾	$	27,384,763,000	$	39,586,900,679	$	44,918,413,591	$	52,102,835,214	$	49,470,359,806	$	43,013,399,177
Total	$	54,728,537,000	$	69,541,039,891	$	76,862,224,651	$	96,673,686,340	$	116,872,192,400	$	115,158,201,562
Prime Mortgages⁽¹⁾		49.96%		43.07%		41.56%		46.10%		57.67%		62.65%
Non-Prime Mortgages⁽²⁾		50.04%		56.93%		58.44%		53.90%		42.33%		37.35%
Total		100.00%		100.00%		100.00%		100.00%		100.00%		100.00%
Percentage Change from Prior Year⁽³⁾
Prime Mortgages⁽¹⁾		7.09%		9.55%		6.64%		39.53%		51.22%
Non-Prime Mortgages⁽²⁾		60.71%		44.56%		13.47%		15.99%		(5.05)%
Total		28.55%		27.07%		10.53%		25.78%		20.89%

~~99.7~~Junior Lien ~~Assignment, Assumption and Recognition Agreement, dated as of April 1, 2007, between The Trustee and the Depositor, and acknowledged by the Master Servicer (regarding the~~ Mortgage Loans ~~serviced by Avelo)~~

99.8 Assignment, Assumption and Recognition Agreement, dated as of April 1, 2007, by and among GSMC, the Depositor and Countrywide Servicing, as servicer

	Year Ended December 31,										Six Months Ended June 30,
Volume by Principal Balance	2002		2003		2004		2005		2006		2007
Prime Mortgages⁽¹⁾	$	7,627,424,000	$	7,402,626,296	$	7,569,300,685	$	7,442,264,087	$	11,418,858,741	$	11,134,597,105
Non-Prime Mortgages⁽²⁾		-		-		-		-		-		-
Total	$	7,627,424,000	$	7,402,626,296	$	7,569,300,685	$	7,442,264,087	$	11,418,858,741	$	11,134,597,105
Prime Mortgages⁽¹⁾		100.00%		100.00%		100.00%		100.00%		100.00%		100.00%
Non-Prime Mortgages⁽²⁾		-		-		-		-		-		-
Total		100.00%		100.00%		100.00%		100.00%		100.00%		100.00%
Percentage Change from Prior Year⁽³⁾
Prime Mortgages⁽¹⁾		(4.94)%		(2.95)%		2.25%		(1.68)%		53.43%
Non-Prime Mortgages⁽²⁾		-		-		-		-		-
Total		(4.94)%		(2.95)%		2.25%		(1.68)%		53.43%

~~99.9~~First Lien ~~Assignment,~~Mortgage ~~Assumption and Recognition Agreement, dated as of April 1, 2007, by and among GSMC, the Depositor and Countrywide, as seller~~Loans

99.10 Assignment, Assumption and Recognition Agreement dated as of April 1, 2007, by and among the Depositor, the Trustee, Countrywide, as seller, and Countrywide Servicing, as servicer, and as acknowledged by the Master Servicer

	Year Ended December 31,										Six Months Ended June 30,
Volume by Number of Loans	2002		2003		2004		2005		2006		2007
Prime Mortgages⁽¹⁾		125,209		143,645		150,297		187,773		252,493		264,077
Non-Prime Mortgages⁽²⁾		257,077		341,190		373,473		394,776		361,125		316,998
Total		382,286		484,835		523,770		582,549		613,618		581,075
Prime Mortgages⁽¹⁾		32.75%		29.63%		28.70%		32.23%		41.15%		45.45%
Non-Prime Mortgages⁽²⁾		67.25%		70.37%		71.30%		67.77%		58.85%		54.55%
Total		100.00%		100.00%		100.00%		100.00%		100.00%		100.00%
Percentage Change from Prior Year⁽³⁾
Prime Mortgages⁽¹⁾		(6.30)%		14.72%		4.63%		24.93%		34.47%
Non-Prime Mortgages⁽²⁾		52.85%		32.72%		9.46%		5.70%		(8.52)%
Total		26.66%		26.83%		8.03%		11.22%		5.33%

~~99.11~~Junior Lien ~~Assignment,~~Mortgage ~~Assumption and Recognition Agreement, dated as of April 1, 2007, among the Depositor, GSMC and RFC, as servicer.~~Loans

99.12 Assignment, Assumption and Recognition Agreement, dated as of April 1, 2007, among the Depositor, the Trustee and RFC, as servicer and as acknowledged by the Master Servicer

	Year Ended December 31,										Six Months Ended June 30,
Volume by Number of Loans	2002		2003		2004		2005		2006		2007
Prime Mortgages⁽¹⁾		217,031		211,585		210,778		199,600		266,900		255,804
Non-Prime Mortgages⁽²⁾		-		-		-		-		-		-
Total		217,031		211,585		210,778		199,600		266,900		255,804
Prime Mortgages⁽¹⁾		100.00%		100.00%		100.00%		100.00%		100.00%		100.00%
Non-Prime Mortgages⁽²⁾		-		-		-		-		-		-
Total		100.00%		100.00%		100.00%		100.00%		100.00%		100.00%
Percentage Change from Prior Year⁽³⁾
Prime Mortgages⁽¹⁾		(5.20)%		(2.51)%		(0.38)%		(5.30)%		33.72%
Non-Prime Mortgages⁽²⁾		-		-		-		-		-
Total		(5.20)%		(2.51)%		(0.38)%		(5.30)%		33.72%

~~99.13~~(1) ~~Interest~~Product ~~Rate~~originated ~~Swap~~under ~~Agreement~~the Jumbo, ~~dated~~Alt ~~as of May 8~~A, ~~2007,~~High ~~including~~Loan ~~ISDA Master Agreement and schedule~~ to ~~the~~Value ~~master~~First ~~agreement,~~Lien ~~between~~programs ~~Goldman~~and ~~Sachs~~Closed ~~Mitsui~~End ~~Marine~~Home ~~Derivative~~Equity ~~Products,~~Loan ~~L.P.~~ and ~~Wells~~Home ~~Fargo~~Equity ~~Bank,~~Revolving ~~National~~Credit ~~Association,~~Line ~~not individually, but solely as Securities Administrator on behalf of the Supplemental Interest Trust with respect to the GSR Mortgage~~ Loan ~~Trust~~Junior ~~2007-OA1~~Lien ~~Mortgage Pass-Through Certificates, Series 2007-OA1~~programs.

⁽²⁾	Product originated under the Subprime and Negotiated Conduit Asset programs. Subprime Mortgage Loans secured by junior liens are included under First Lien Mortgage Loans—Non-Prime Mortgages because these types of loans are securitized together in the same mortgage pools.

⁽³⁾	Represents year to year growth or decline as a percentage of the prior year’s volume.

Billing and Payment Procedures. As servicer, GMACM collects and remits mortgage loan payments, responds to borrower inquiries, accounts for principal and interest, holds custodial and escrow funds for payment of property taxes and insurance premiums, counsels or otherwise works with delinquent borrowers, supervises foreclosures and property dispositions and generally administers the loans. GMACM sends monthly invoices or annual coupon books to borrowers to prompt the collection of the outstanding payments. Borrowers may elect for monthly payments to be deducted automatically from bank accounts on the same day every month or may take advantage of on demand electronic payments made over the internet or via phone. GMACM may, from time to time, outsource certain of its servicing functions, such as contacting delinquent borrowers, property tax administration and hazard insurance administration, although any such outsourcing will not relieve GMACM of any of its responsibilities or liabilities as a servicer.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

GS MORTGAGE SECURITIES CORP.

By: /s/~~Michelle~~ Greg ~~Gill~~ Finck

Name: ~~Michelle~~Greg ~~Gill~~Finck

Title: Vice President

Dated: ~~May 23~~October 3, 2007

EXHIBIT INDEX

Exhibit No. Description

4.5 Master Servicing and Trust Agreement dated as of April 1, 2007, among GS Mortgage Securities Corp., as depositor (the “Depositor”), Wells Fargo Bank, N.A. as securities administrator and master servicer (in such capacity, the “Master Servicer”), U.S. Bank National Association, as a custodian, and Deutsche Bank National Trust Company, as Trustee and a as custodian (“Trustee”)

99.1 Flow Servicing Agreement dated as of January 1, 2006, between Goldman Sachs Mortgage Corporation (“GSMC”), as owner, and Avelo Mortgage, L.L.C. (“Avelo”), as servicer

99.2 Master Mortgage Loan Purchase Agreement dated as of July 1, 2004 between GSMC, as purchaser, and Countrywide Home Loans, Inc. (“Countrywide”), as seller

99.3 Servicing Agreement dated as of July 1, 2004, between GSMC, as purchaser, and Countrywide Home Loans Servicing LP (“Countrywide Servicing”), as servicer

99.4 Amendment Reg AB, dated as of January 1, 2006, to the Master Mortgage Loan Purchase Agreement and the Servicing Agreement each dated as of July 1, 2004 between GSMC, as purchaser, and Countrywide

99.5 Standard Terms and Provisions of Sale and Servicing Agreement dated as of September 29, 2005 between GSMC and Residential Funding Company, LLC (“RFC”)

99.6 Assignment, Assumption and Recognition Agreement, dated as of April 1, 2007, among the Depositor, GSMC and Avelo, as servicer

99.7 Assignment, Assumption and Recognition Agreement, dated as of April 1, 2007, between The Trustee and the Depositor, and acknowledged by the Master Servicer (regarding the Mortgage Loans serviced by Avelo)

99.8 Assignment, Assumption and Recognition Agreement, dated as of April 1, 2007, by and among GSMC, the Depositor and Countrywide Servicing, as servicer

99.9 Assignment, Assumption and Recognition Agreement, dated as of April 1, 2007, by and among GSMC, the Depositor and Countrywide, as seller

99.11 Assignment, Assumption and Recognition Agreement, dated as of April 1, 2007, among the Depositor, GSMC and RFC, as servicer.

99.12 Assignment, Assumption and Recognition Agreement, dated as of April 1, 2007, among the Depositor, the Trustee and RFC, as servicer and as acknowledged by the Master Servicer

99.13 Interest Rate Swap Agreement, dated as of May 8, 2007, including ISDA Master Agreement and schedule to the master agreement, between Goldman Sachs Mitsui Marine Derivative Products, L.P. and Wells Fargo Bank, National Association, not individually, but solely as Securities Administrator on behalf of the Supplemental Interest Trust with respect to the GSR Mortgage Loan Trust 2007-OA1 Mortgage Pass-Through Certificates, Series 2007-OA1

Filing Compare · GSR Mortgage Loan Trust 2007-OA1