Apologies to anyone that PMd me and I haven't replied yet. Unfortunately my real life has been very busy.
Currently the biggest GP supported game is MMO RPG Dragon Knights of Valeria at
http://dknight.ml/The game currently has over 1000 players!
I've been in touch with Inkha (the original GP developer) and together we should be making sure GP has a lot more games and projects soon.
I am also looking for someone to manage the official GP twitter account, please PM me if you are interested.
I am also looking for a community manager here on bitcointalk that can answer questions, and post updates about GP developments like new games etc.
I would also like to hear from anyone that would like to develop and online game or app that supports GP. Please PM me with your ideas. Bounties will be offered on completion of your work.
As GP had no premine, any bounties will be offered from my personal GP.