A girl who plays games. The games can be on consoles, handhelds, pc's and so on.
Most people see girlgamers as nerdy looking girls with absolutely no sense of fashion and social life (If you want to be that way have fun being that way. no offence...) However there is also a large group of girls out ther who just like to play games, (all sorts of games like DOA and Final Fantasy but also Battlefield and Ghost reckon) they have a normal soial life, a lot of friends, and a good sense of fashion. We just like to game.
"Wow that girl totally owned you with Dead or Alive"
"Yea she is a great girlgamer"