Hmmm...
I don't know about this story. Sorry. But I can't find a single Gios frame without lugs, with gussets, on the internet. Very vague, too. When did you speak to Alfredo? What year did he tell you the frame is? Model? Paid $500 sight unseen? 80th Gios? What does that even mean?
The decals and even the headbadge (which, by the way, is a pretty recent version) are readily available on Ebay. I think someone put this together using a Gios fork, but I have no idea who made the frame.
Call me a healthy skeptic.
DD