GPT = Gamers Pros Teamers.
It is referring to a clan name made by two retarded ass kids in 2014.
But people who are a part of this clan automatically have big cocks, muscular Chad physique, very good looking.
Or if you're a girl GPT you have big hentai titties, big African ass with sexy chunky legs and beautiful face.
Oh you're GPT?, fuck me please *moans*