GG is definitely not as active as the other games. The old guard doesn't really come out to gatherings anymore, though there are still a select few who are still enthusiastic about the game. Weekly gatherings at GP average about 0.8 GG setups per week. People will play if someone brings the game, but usually you have to seek out the players themselves and ask them if they want to play GG. Always willing to oblige, but never the game that everyone naturally gravitates toward.
EDIT: Oh yeah, I forgot about the PS3 release.