GTR is a versatile Quake 4 modification that aims to make the game more enjoyable, and it's developement will never be limited with a ruleset such as "VQ4" (Basic Quake 4). Some of the changes are:
It is based on the X-Battle 0.20 source, but it's not compareable anymore. GTR uses resources of the Creative Common Q4 project, such as Brightskins and Weaponskins. GTR will add lots of new gametypes to quake4, like Freezetag, OneFlag CTF, Time Runs to name some.
Continue browsing the modlist, to find the profile you are after.