GT means Get Together, it's when all members of PC are invited to join in on some fun events organized by other members. It's a great time to have fun with other members and maybe even chat with them, like right now there is a Skype group for it and I've been talking it up like yeah with those are who on there right now and I've joined a hunting event hosted by one of my good friends.
As for games, I've been playing mostly PSMD, Omega Ruby, Hitman: Blood Money, and Until Dawn.