The Citadel is an archive of information for George R.R. Martin's A Song of Ice and Fire.
New to the series? Read our spoiler-free review of A Game of Thrones.
[GRRM is asked whether he's actually writing up the results of roleplaying game sessions.]
Sorry, no. WILD CARDS was based on a role-playing game I ran back in the 80s, but A SONG OF ICE AND FIRE has no ties to any rpg.
The Westeros network consists of several different sites, including a forum and a wiki, for all your A Song of Ice and Fire needs.