From Geeki
Unless otherwise stated, GARS needs a properly working version of vBulletin. The following is a list of vBulletin versions and their corresponding version numbers that are known to function. Please note that GARS may work fine on previous versions of vBulletin as well as newer versions of vBulletin.
vBulletin 3.6.4
vBulletin 3.6.5
vBulletin 3.6.7PL1