Me neither! But you're quite right.
The car was built, like you said, in 1972. It was built by a hillclimb specialist (as far as I understand) called František Němec, with help from an Alfa expert, engineer Ladislav Duboczy. The chassis was from a Škoda 100, and it had a Fiat 1600 cc engine (130 hp).
I give you these three pictures of Mr. Němec's creations (top to bottom GIOM 1, GIOM 4 and GIOM 5). Apart from what I've told you, I can also reveal two things about our friend František: a) he has a thing for recycling numberplates, and b) he apparently thinks he looks good without his shirt.