The Cheetah is Grotti's sports car from the middle of the 1990s, with a plain retro-futuristic livery, described as an ode to Shore Drive. Rockstar says it shows up later in the action. It is not there on the first day of play.
The Ultimate text reads: 'Grotti's signature mid '90s sports car and ode to Shore Drive, complete with a minimalist, retro-futuristic livery and available to punctuate later-stage action.'
Grotti is the series' stand-in for Italian supercar makers, and the Cheetah has been one of its signature models since Grand Theft Auto III and Vice City.