Guaranty Financial 10-K 2007 FY Annual report

Exhibit 32.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER
PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED
PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

     I, Ronald D. Murff, Chief Financial Officer of Guaranty Financial Group Inc., hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that this Annual Report on Form 10-K fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that the information contained in this Annual Report on Form 10-K fairly presents, in all material respects, the financial condition and results of operations of Guaranty Financial Group Inc.

/s/ Ronald D. Murff
Ronald D. Murff
Chief Financial Officer

Date: February 29, 2008