The pre-order includes the Stanier and a garage. Rockstar Support names that garage without an address. In edition guides the building is called Shore Court, near Ocean Beach. Use that name as a search hint, and the support page as the source for what is certainly in the pack.
GTA Boss quotes the garage as Shore Court, 'a stone's throw from the glistening sands of Ocean Beach,' with a weapon locker and a place to fence stolen goods. We could not read that wording on Rockstar's own support page, so treat the name as reported.
The pack comes with both editions, as long as the digital purchase is made in time.