UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington D.C. 20549

FORM 10-D

ASSET BACKED ISSUER
DISTRIBUTION REPORT PURSUANT TO SECTION 13 OR 15(d) OF
THE SECURITIES EXCHANGE ACT OF 1934

For the monthly distribution period from: ~~January~~February 1413, 2025 to ~~February~~March 12, 2025

Commission File Number of issuing entity: 333-191331-07

Central Index Key Number of issuing entity: 0001630477

GS Mortgage Securities Trust 2015-GC28
(Exact name of issuing entity as specified in its charter)

Commission File Number of depositor: 333-191331

Central Index Key Number of depositor: 0001004158

GS Mortgage Securities Corporation II
(Exact name of depositor as specified in its charter)

Central Index Key Number of sponsor (if applicable): 0001541001

Citigroup Global Markets Realty Corp.
(Exact name of sponsor as specified in its charter)

Central Index Key Number of sponsor (if applicable): 0001541502

Goldman Sachs Mortgage Company
(Exact name of sponsor as specified in its charter)

Central Index Key Number of sponsor (if applicable): 0001558761

Cantor Commercial Real Estate Lending, L.P.
(Exact name of sponsor as specified in its charter)

Central Index Key Number of sponsor (if applicable): 0001576832

MC-Five Mile Commercial Mortgage Finance LLC
(Exact name of sponsor as specified in its charter)

Central Index Key Number of sponsor (if applicable): 0001682511

Starwood Mortgage Funding I LLC
(Exact name of sponsor as specified in its charter)

Scott Epperson (212) 934-2882
(Name and telephone number, including area code, of the person to contact in connection with this filing)

New York
(State or other jurisdiction of incorporation or organization of the issuing entity)

38-3952073
38-3952074
38-7127895
(I.R.S. Employer Identification No.)

c/o Computershare Trust Company, N.A., as agent for
Wells Fargo Bank, National Association
9062 Old Annapolis Road
Columbia, MD 21045
(Address of principal executive offices of the issuing entity) (Zip Code)

(667) 786-1992
(Telephone number, including area code)

Not Applicable
(Former name, former address, if changed since last report)

Registered/reporting pursuant to (check one)

Title of Class	Section 12(b)	Section 12(g)	Section 15(d)	Name of Exchange (If Section 12(b))
A-1			X
A-2			X
A-3			X
A-4			X
A-5			X
A-AB			X
A-S			X
PEZ			X
B			X
C			X
X-A			X
X-B			X

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes X No

Part I - DISTRIBUTION INFORMATION

Item 1. Distribution and Pool Performance Information.

On ~~February~~March 12, 2025 a distribution was ~~made~~ made to holders of the certificates issued by GS Mortgage Securities Trust 2015-GC28.

The distribution report is attached as an Exhibit to this Form 10-D, please see Item 10(b), Exhibit 99.1 for the related information.

The following table presents the loss information for the trust assets for the GS Mortgage Securities Trust 2015-GC28 in accordance with Item 1100(b) as required by Item 1121(a)(9) of Regulation AB:

Loss Information as reported on FebruaryMarch 12, 2025

Number of Delinquencies 30+ days	% of Delinquencies 30+ days by Pool Balance	Number of Loans/REOs with Losses	Average Net Loss
6	100.00%	6	$1,002,478.25

No assets securitized by GS Mortgage Securities Corporation II (the "Depositor") and held by GS Mortgage Securities Trust 2015-GC28 were the ~~subject~~ subject of a demand to repurchase for breach of the representations and ~~warranties~~ warranties contained in the underlying transaction documents during the ~~distribution~~ distribution period from ~~January~~February 1413, 2025 to ~~February~~March 12, 2025.

The Depositor has filed a Form ABS-15G on February 12, 2025. The CIK number of the Depositor is 0001004158. There is no new activity to report at this time.

Citigroup Global Markets Realty Corp. ("CGMRC"), one of the sponsors, has filed a Form ABS-15G on February 13, 2025. The CIK number of CGMRC is 0001541001. There is no new activity to report at this time.

Goldman Sachs Mortgage Company ("GSMC"), one of the sponsors, has filed a Form ABS-15G on February 13, 2025. The CIK number of GSMC is 0001541502. There is no new activity to report at this time.

Cantor Commercial Real Estate Lending, L.P. ("CCREL"), one of the sponsors, has filed a Form ABS-15G on January 22, 2025. The CIK number of CCREL is 0001558761. There is no new activity to report at this time.

MC-Five Mile Commercial Mortgage Finance LLC ("MC-Five Mile"), one of the sponsors, has filed a Form ABS-15G on February 16, 2021. The CIK number of MC-Five Mile is 0001576832. There is no new activity to report at this time.

Starwood Mortgage Funding I LLC ("Starwood"), one of the sponsors, has filed a Form ABS-15G on January 23, 2025. The CIK number of Starwood is 0001682511. There is no new activity to report at this time.

Part II - OTHER INFORMATION

Item 62. ~~Significant~~Legal ~~Obligors of Pool Assets~~Proceedings.

~~The~~Disclosure ~~Mortgagor~~from ofWells ~~the Airport Technology Park Mortgage~~Fargo ~~Loan~~Bank, ~~which~~National ~~represents~~Association, ~~10% or more of the pool assets held by the issuing entity~~ as ofcertificate ~~its cut-off date~~administrator, ~~consummated~~custodian ~~a full defeasance of the Airport Technology Park Mortgage Loan by substituting government securities backed by the full faith~~ and ~~credit of the United States for all of the related Mortgaged~~/or ~~Property pursuant to the Mortgage Loan documents.~~trustee:

~~Item~~In December 102014, Phoenix Light SF Limited (Phoenix Light) and certain related entities filed a complaint in the United States District Court for the Southern District of New York alleging claims against Wells Fargo Bank, N.A., ~~Exhibits~~in its capacity as trustee for a number of residential mortgage-backed securities (RMBS) trusts. Complaints raising similar allegations have been filed by Commerzbank AG in the Southern District of New York, IKB International and IKB Deutsche Industriebank (together, IKB) in New York state court, and Park Royal I LLC and Park Royal II LLC in New York state court. In each case, the plaintiffs allege that Wells Fargo Bank, N.A., as trustee, caused losses to investors, and plaintiffs assert causes of action based upon, among other things, the trustee’s alleged failure to notify and enforce repurchase obligations of mortgage loan sellers for purported breaches of representations and warranties, notify investors of alleged events of default, and abide by appropriate standards of care following alleged events of default. In July 2022, the district court dismissed Phoenix Light’s claims and certain of the claims asserted by Commerzbank AG, and subsequently entered judgment in each case in favor of Wells Fargo Bank, N.A. In August 2022, Phoenix Light and Commerzbank AG each appealed the district court’s decision to the United States Court of Appeals for the Second Circuit. Phoenix Light dismissed its appeal in May 2023, terminating its case. In October 2024, the Second Circuit denied Commerzbank AG’s appeal. In November 2023, Wells Fargo Bank, N.A. entered into an agreement with IKB to resolve IKB’s claims. Wells Fargo Bank, N.A. previously settled two class actions filed by institutional investors and an action filed by the National Credit Union Administration with similar allegations.

~~(a)~~Item ~~The~~6. ~~following~~Significant isObligors ~~a list~~ of ~~documents~~Pool ~~filed~~Assets. ~~as part of this Report on Form 10-D:~~

~~(99.1)~~The ~~Monthly~~Mortgagor ~~report~~of ~~distributed~~the toAirport Technology Park Mortgage Loan, ~~holders~~which represents 10% or more of the ~~certificates~~pool ~~issued~~assets held by GSthe ~~Mortgage~~issuing entity as ~~Securities~~of ~~Trust~~its ~~2015~~cut-~~GC28~~off date, ~~relating~~consummated toa full defeasance of the ~~February~~Airport Technology ~~12,~~Park ~~2025 distribution.~~Mortgage Loan by substituting government securities backed by the full faith and credit of the United States for all of the related Mortgaged Property pursuant to the Mortgage Loan documents.

~~(b)~~Item ~~The~~10. ~~exhibits required to be filed by the Registrant pursuant to this Form are listed above~~Exhibits.

~~SIGNATURES~~(a) The following is a list of documents filed as part of this Report on Form 10-D:

~~Pursuant~~(99.1) toMonthly ~~the~~report ~~requirements~~distributed to holders of the ~~Securities~~certificates ~~Exchange~~issued ~~Act~~by ofGS ~~1934, the~~Mortgage ~~registrant~~Securities ~~has~~Trust ~~duly~~2015-GC28, ~~caused~~relating ~~this report~~ to ~~be signed on its behalf by~~ the March ~~undersigned~~12, ~~thereunto duly authorized~~2025 distribution.

GS(b) ~~Mortgage~~The ~~Securities~~exhibits ~~Corporation~~required IIto be filed by the Registrant pursuant to this ~~(Depositor)~~Form are listed above.

~~/s/ Scott Epperson Scott Epperson, Chief Executive Officer~~SIGNATURES

~~Date: February~~Pursuant 21to the requirements of the Securities Exchange Act of 1934, ~~2025~~the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

GS Mortgage Securities Corporation II
(Depositor)

/s/ Scott Epperson
Scott Epperson, Chief Executive Officer

Date: March 25, 2025

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington D.C. 20549

FORM 10-D

ASSET BACKED ISSUER DISTRIBUTION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Registered/reporting pursuant to (check one)

Loss Information as reported on FebruaryMarch 12, 2025

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington D.C. 20549

ASSET BACKED ISSUER
DISTRIBUTION REPORT PURSUANT TO SECTION 13 OR 15(d) OF
THE SECURITIES EXCHANGE ACT OF 1934

Filing Compare · GS Mortgage Securities Trust 2015-GC28