The RSGC is the short-hand term for "The RuneScape Global Communities". These are a set of forums for RuneScape players who want to get better at the game, but find it hard on their own.
The forums are lead by: Duelist91 and Krobeluskill
Player: "I want to get my skills up... but I'm too fat and lazy to do it on my own".
RSGC Admin: "Come to the RSGC, we'll help you!"