EXHIBIT 32.1


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


In connection  with the Annual Report of GTJ REIT,  Inc. (the "Company") on Form
10-K for the year  ended  December  31,  2007 as filed with the  Securities  and
Exchange  Commission  on the date  hereof  (the  "Periodic  Report"),  I, Jerome
Cooper, Chief Executive Officer of the Company,  certify,  pursuant to 18 U.S.C.
Section 1350, as adopted  pursuant to Section 906 of the  Sarbanes-Oxley  Act of
2002, that:

1.   the Periodic  Report fully complies with the  requirements of Section 13(a)
     or 15(d) of the Securities Exchange Act of 1934; and

2.   the information  contained in the Periodic Report fairly  presents,  in all
     material respects, the financial condition and results of operations of the
     Company.




Date:    April 30, 2008                      /s/ Jerome Cooper
                                          --------------------------------
                                          Jerome Cooper
                                          Chief Executive Officer