Notably there's no "F" in the 250 GTO's name just like there's no Gran Turismo Omologato F-250 trim level.As for the name "that's been around for decades" as you proudly said, Ferrari 250 GTO is 60 years old car and it's MOST EXPENSIVE CAR in history so they should sue Ford for using number 250?
Not that the latter matters.
Notably there's no "250" in the Pontiac GTO's name; just like there wasn't a "599" in the Pontiac GTO's name. Pontiac was also pretty explicitly cheekily referencing the former to begin with and American car magazines were all in on the joke; but it's still not the same thing as being legally actionable as it would be if Ferrari straight up released a car badged F250. Assuming, of course, that the 250 GTO was sold "officially" in America in the first place or indeed that there was even anybody who would have had standing to sue Pontiac to begin with, since Ferrari's entire US presence at the time was basically just one guy importing cars for his personal car dealership and the 250 GTO was explicitly a race car that found life as a road car after it was no longer competitive.Or suing Pontiac for taking GTO badge for their entire muscle car lineage!???
And as for...
Ferrari took pains to make it so that was not available in the US.
And, in fact, we helpfully already have an example of a car with the exact same name being changed for international markets to avoid the ire of attempting to use a registered trademark closely aligned to a major domestic car company:
Or even two cars that came out at the same time that were renamed as a compromise between two manufacturers:
It's almost as if major manufacturers consider trademarks to be important or something.
It isn't Ferrari's fault that Americans steal both names and designs from Europe as older continent.
And it isn't just for the cars, it's language (english), architecture ( very own "white house" is made with "inspiration" of Rome and Greeks) etc.
Read a little, don't worry, your brain will be fine and you can learn something about cars( maybe)...
Don't worry. When you figure out what this is it will only make you look as foolish as we all already think you are., Mr. 2004-era Tifosi.