Who is Gustavo?

So i just went back and checked the (embarrassingly sparse) comments from the past few posts, and have to ask: Who is Gustavo? I don't know anyone with this nick name. I don't know anyone who's name that is known to me is even remotely close. So who is this mystery person?

Show yourself! The power of Christ compels you!

BTW, WoW is the devil's tool.