When she realizes that nerds and geeks will flock to her and shower her with attention for being a rarity - she does everything she can to ensure she continues to get said attention.
Buying geeky accessories, joining groups like the D20 Girls, posting suggestive + geeky pictures to the Internet, fawning over Magic cards, incessantly talking about D&D, and basically wrapping herself and her identity up completely in being a nerdy/geeky/gamer - solely because it gets her the attention she couldn't get from ANYONE ELSE.
Also known, in other subcultures, as a faker, wannabe, or poser.
Smith: Yeah, I saw her. I bet she doesn't even know what THAC0 is. She's got a bad case of Gamer Girl Syndrome.