GX3 is an eclectic video game convention that was started a few years ago. It was previously called GaymerX and targeted at the LGBT community, but now the event is being marketed to all gamers. This year they are going by GX3 with the tagline "Everyone Games." The past two events have been held in San Francisco, but the San Jose Marriott will claim this event for 2015 (Dec 11-13).
For more details, check out this Kickstarter page or hit the source link below.