Gateway Canyons Resort is owned by John Hendricks (Discovery Channels). The museum houses his collection, the spotlight is the Olds F88 that he bought at Barrett Jackson. The cars on the ad were his, but I don't think he has them any more. My wife and I went to the hotel/museum in October 2008. I've stayed at the restort a couple of other times since. It used to be a steal but then he turned it over to the management company that does big resorts and they upped the rates. It's still a good place to go though.
The cars were part of a "package" you could get - something like $10K got you lodging and a week of driving any or all of the cars in the collection:
Ford GT
Ferrari 360
Aston Martin DB9
Corvette Z06
(There were two of each). I was told when I inquired about the Red GTs that he had sold one of each and kept the other one(s). The "package" was retired in 2009 or so.
It's an interesting Rally story about the cars and the environment of the valley.
I think posted a bunch of pictures of them here at some point.
If you're looking to go I can tell you the hotel and restaurant are world class, the museum will take you all day to go through, and the little town of Gateway has all kinds of outdoor things to do. Here's a picture of the cars in front of the resort: