Exhibit
32.1
CERTIFICATION TO SECTION 906 OF THE SARBANES-OXLEY ACT OF
2002
Pursuant to 18 U.S.C. § 1350, as created by Section 906 of the
Sarbanes-Oxley Act of 2002, I, Shawn Cross, Chief Executive Officer
of GT Biopharma, Inc. (the “Company”), hereby certify
that, to the best of my knowledge:
(i)
the Annual Report on Form 10-K of the Company for the fiscal year
ended December 31, 2015 (the “Report”) fully complies
with the requirements of Section 13(a) or Section 15(d), as
applicable, of the Securities Exchange Act of 1934, as amended;
and
(ii)
the information contained in the Report fairly presents, in all
material respects, the financial condition and results of operation
of the Company.
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Date:
February 28, 2018
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By:
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/s/ Shawn
Cross
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Name:
Shawn Cross
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Title:
Chief Executive Officer and Chairman of the Board (Principal
Executive Officer)
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