Exhibit 24

                               POWER OF ATTORNEY

Know all by these present, that the undersigned hereby constitutes and appoints
David L. Green, Global Payments Inc.'s Senior Executive Vice President, General
Counsel and Corporate Secretary, signing singly, her true and lawful attorney-
in-fact to:

     (1) execute for and on behalf of the undersigned Forms 3, 4 and 5 relating
         to shares of Global Payments Inc., in accordance with Section 16(a) of
         the Securities Exchange Act of 1934 and the rules thereunder;

     (2) do and perform any and all acts for and on behalf of the undersigned
         which may be necessary or desirable to complete the execution of any
         such Form 3, 4 or 5 and the timely filing of such form with the United
         States Securities and Exchange Commission and any other authority; and

     (3) take any other action of any type whatsoever in connection with the
         foregoing which, in the opinion of such attorney-in-fact, may be of
         benefit to, in the best interest of, or legally required by, the
         undersigned, it being understood that the documents executed by such
         attorney-in-fact on behalf of the undersigned pursuant to this Power of
         Attorney shall be in such form and shall contain such terms and
         conditions as such attorney-in-fact may approve in his discretion.

The undersigned grants to such attorney-in-fact full power and authority to do
and perform all and every act and thing whatsoever requisite, necessary and
proper to be done in the exercise of any of the rights and powers herein
granted, as fully to all intents and purposes as such attorney-in-fact might or
could do if personally present, with full power of substitution or revocation,
hereby ratifying and confirming all that such attorney-in-fact, or his
substitute or substitutes, shall lawfully do or cause to be done by virtue of
this power of attorney and the rights and powers herein granted.  The
Undersigned acknowledges that the foregoing attorney-in-fact, in serving in such
capacity at the request of the undersigned, is not assuming any of the
undersigned's responsibilities to comply with Section 16 of the Securities
Exchange Act of 1934, as amended.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed this 17th day of September, 2019.

/s/ Connie D. McDaniel
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Connie D. McDaniel