OK, I think I have updated this to BTS 3.13. It has not been very extensively tested, although so far it seems to work. That is to say, it launches the game and everything works including appearance of GPs but I have not tested with unique GPs set up in xml, so if someone could test that it would be great. Please note that the DLL incorporates Bhruic's patch.
http://forums.civfanatics.com/uploads/32894/gpmod.zip
EDIT/UPDATE: Have tested this a little more extensively now, with Great Person UUs. Seems to work just fine!