Nice looking car, but is it a true GTO? The pics of the rear show a trunk w/o emblem and tail panel that says automatic. I have seen that alot on the Lemans. To be a true GTO it has a vin # beginning with 242, Lemans is 237. Still a nice looking car.
05b 1; Your car was built the 2nd week of May, 1967,
ST-67-24217; Pontiac GTO hardtop
TR 223-b; black bucket seats
Paint A-2 Starlight Black with a black vinyl top
Pon19375; Your car was the 19,375th 24217 built in Pontiac,MI
2ZG; 3 speed automatic transmission with console
5Y; Deluxe front seat belts
What is the engine code, that may explain the Automatic badge on the back of the car. It could be part of a package for xm, yz or xp engines.
YZ is the automatic version of the 400 H.O., this engine came from the factory with 360HP, Total production for the H.O. engine was 13,827. In 67 the big 3 were all touting the 4 speeds in their H.O. muscle cars and it was not as common to find the H.O. in an automatic, That may explain the badge to identify the H.O. automatics.
It looks like you have a good car to restore, I suggest contacting PHS and having the car documented. All information you have shared suggest the car is a numbers matching GTO.