Now don't jump to conclusions so quickly. I was at the POCI convention in Gettysburg PA in i think it was 1981. Jim Wangers, the father of the GTO was the keynote speaker at the dinner.
He showed us slides of what the judge was originally supposed to look like with a camaro rear spoiler etc. he told us the history of the GTO from an insiders perspective. Told us about how the Monkeemobile sold cars when Nesmith (i think it was Nesmith) got clocked at something like 150 on Sunset and GM tried to squash the story, and he sent it to every paper in the world. About how the famous GTO under the Woodward sign ad came to be.
At the end he said we all had it wrong. GTO did indeed originally come from Ferrari, but in reality it was just a box on the order form like the COPO Camaros. Internally there was a lot riding on the success of the big motor in the small car. GTO was from a memo he sent to DeLorean or the other way around, and it stood for Get Those Orders!!