I don't think Clodfather and GPK are part of the same set, unless he added them later. There were other Lost Wacky ventures leading up to 2005--I have a Gooya (unused from ANS1), and I'm trying to remember where that came from.
You may be right. I'm not sure. I do have the scans from a group of listings all sold by the same seller at the same time about 5 years ago. Most lost wackys or homemade wackys didn't have any copyrights. The GPK & Clodfather appear very similar to the others in the set, and considering them all being listed together, that was my guess. You have more direct knowledge of the creator & origin of the set. It would be cool to find out one way or another for sure. Maybe someone else has additional info?
I'd be interested in finding out more info about other lost (&/or homemade) wacky projects pre 2005 if you have any scans or info to share.