http://forum.xda-developers.com/showthread.php?t=592584
this is the original GTX thread at XDA
http://forum.xda-developers.com/showthread.php?t=666636
this is the thread where development will be continuing
http://forum.ppcgeeks.com/showthread.php?t=117497
and this is where you'd find MORE GTX related items here in the themes forum if you'd looked a little further.
GTX in it's current form does NOT support CHT 1.7 or 1.7.1. Dark Ninja at XDA has a team of folks working on the project to continue refinement and development.