Without a look at the VIN plate, this one is tough to call for certain.
It certainly could be a de-badged 1968 Pontiac GTO ragtop.
Far more likely, though, someone has added an Endura nose, scooped hood, and GTO taillights to a 1968 Pontiac LeMans or Tempest. Ethical people who do this (especially if they go whole hog and add GTO badging) will call the resulting rides "GTO Tributes". Unethical people will try and pawn them off on unsuspecting buyers as real Goats.