EXHIBIT 32

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350

We, each hereby certify to the best of our knowledge that the Annual Report of Form 10-K of Gateway Tax Credit Fund III, Ltd. for the year ended March 31, 2012 containing the financial statements fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o (d)) and that information contained in the periodic report fairly presents, in all material respects, the financial condition and results of operations of Gateway.

/s/ Ronald M. Diner

Ronald M. Diner

President

Raymond James Tax Credit Funds, Inc.

(the Managing General Partner)

June 25, 2012

/s/ Toni S. Matthews

Toni S. Matthews

Vice President and Chief Financial Officer

Raymond James Tax Credit Funds, Inc.

(the Managing General Partner)

June 25, 2012