Meanings of GK

A game contest has a question about what Fanboys are called in Japan slang.

My Japanese friends didn't even know this.

It turns out, GK, is 2ch.net slang for Sony Computer Entertainment (SCE) employee, according to Yahoo Japan's search result #1.

If you scroll down, it says GK is also Gatekeeper (ゲートキーパー), =fanboys in 2ch.net slang.

Proof: http://ja.wikipedia.org/wiki/%E3%82%B2%E3%83%BC%E3%83%88%E3%82%AD%E3%83%BC%E3%83%91%E3%83%BC