You can already place your ship in orbit by dropping out prematurely. You can drop out from anywhere by pressing the J-button while going at a low speed. I don't see why you would need to auto-pilot your ship to it, although given the fact that you can dismiss your ship from the SRV, I see it's possible that the ship has such a function built-in.
Furthermore, not all planets have a geosynchronous orbit. Some have too low of a mass or rotate too quickly.