Founded in 2013 as GaymerX, a convention aimed at creating a safe space for LGBT gamers, the event has since shifted its message to inclusivity of all (though non-LGBT people were never barred from attendance). Hence the new title and subtitle for the 2015 convention: "GX3: Everyone Games."
The 2015 event seemed unlikely after issues arose concerning a donation, but that dispute was quickly settled. At the same time, other companies such as Devolver Digital chipped in, helping the organizers secure funding.
Joystiq attended GaymerX2 in July - did you come out and see us?