The Phantom is real, but I believe the Maybach and Continental GT are still photoshops. You can go to the Genaddi Design website and see more pictures, one can easily tell that some are real and some are photoshops (but they're working on the real things)
The Maybach convertible is a photoshop, you can tell from these two pictures below : the people in the background are in exactly the same positions..unless they're statues
Their website is
www.vgdauto.com