Rule13a-14(d)/15d-14(d) Certifications.

 

I, LeahNivison, certify that:

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| 1.     | I have reviewed this report  on Form 10-K and all reports on Form 10-D required to be filed in respect of  the period covered by this report on Form 10-K of the GS Mortgage Securities  Trust 2015-GC28 (the "Exchange Act periodic reports");                                                                                                                                                                                                                                                                                                                       |
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| 2.     | Based on my knowledge, the  Exchange Act periodic reports, taken as a whole, do not contain any untrue  statement of a material fact or omit to state a material fact necessary to  make the statements made, in light of the circumstances under which such  statements were made, not misleading with respect to the period covered by  this report;                                                                                                                                                                                                                          |
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| 3.     | Based on my knowledge, all  of the distribution, servicing and other information required to be provided under  Form 10-D for the period covered by this report is included in the Exchange  Act periodic reports;                                                                                                                                                                                                                                                                                                                                                              |
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| 4.     | Based on my knowledge and  the servicer compliance statements required in this report under Item 1123 of  Regulation AB, and except as disclosed in the Exchange Act periodic reports,  the servicers have fulfilled their obligations under the servicing agreements  in all material respects; and                                                                                                                                                                                                                                                                            |
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| 5.     | All of the reports on assessment  of compliance with servicing criteria for asset-backed securities and their  related attestation reports on assessment of compliance with servicing  criteria for asset-backed securities required to be included in this report  in accordance with Item 1122 of Regulation AB and Exchange Act Rules 13a-18  and 15d-18 have been included as an exhibit to this report, except as  otherwise disclosed in this report. Any material instances of noncompliance  described in such reports have been disclosed in this report on Form 10-K. |
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Ingiving the certifications above, I have reasonably relied on informationprovided to me by the following unaffiliated parties:Wells Fargo Bank, National Association, as Master Servicer, Rialto Capital Advisors,LLC , as Special Servicer, Wilmington Trust, National Association, as Trustee,Wells Fargo Bank, National Association, as Certificate Administrator, WellsFargo Bank, National Association, as Custodian, Pentalpha Surveillance LLC, asOperating Advisor, CoreLogic Commercial Real Estate Services, Inc., asServicing Function Participant, National Tax Search, LLC, as Servicing FunctionParticipant, and Berkeley Point Capital LLC, as Primary Servicer.

 

Dated: March 24, 2017

 

/s/ Leah NivisonChief Executive Officer

(senior officer in charge ofsecuritization of the depositor)