I am asking because my brother has an account here and I would like to get him a gift, but I don't know what he wants/already has, though I do know his account name. I snooped a bit in the support section but couldn't find an answer, so I came here. Thanks for your help.

Oh woe! If only your brother had followed this suggestion!
But well, since I only posted that today, and there's some debate on how good of an idea it actually is, I doubt he has. Still, you could ask him to make a GOGMix with his wishlist, but I suppose that would sort of take away the element of surprise :P