Obligatory Warning: I am not Charles Gunn nor do I own the character. He belongs to Joss Whedon and Mutant Enemy. I just like to play him in games from time to time. Just borrowing, please do not get confused and/or sue me.
Extra quick note: Gunn here is involved in several games. As such, I can't post any application to his profile because it would get confusing fast. Refer to his journal for information. All entries are tagged with the game they refer to, so it shouldn't be complicated to figure out what goes to what.