To be honest, I do think it is a bit odd that such a strange and small blog would be linked all over The Residents' website before it had even really started. And yes, it's rather strange that
Gio's picture on his "About" section happens to be a stock image or that
the domain registry information is rather... interesting. (Copy and paste the small text if you wish to stop suspending your disbelief). But in the end, it doesn't really matter whether Gio is "real" or not. To quote the man himself:
Yes, The Residents do seem to be playing a game, but it is not “guess who we are.” If that were the case, the game would be over the moment someone guesses correctly, and where’s the fun in that? The Residents’ game is actually “come pretend with us,” which is much more satisfying because it doesn’t have to end.
So in the end, as a fan of The Residents, I consider him a real person who really lived and journaled through The Residents' entire discography. And their grandchild posts all of those journal entries onto a blog.
Now... I do have to say that I do take some of Gio's assumptions a bit more seriously than those of a standard fan. Something about him just makes him seem... persuasive... so when he says he thinks The Residents were maybe planning an album based on dreams... well, his persuasiveness gets to me and now I think that might have been a possibility!
Also on an unrelated note, the pictures on all the blog posts have funny mouseover text and it took me a while to discover this, so I'm assuming not many other people have realized this as well.