The Sales code for the MyGig unit is RER part number 5064080AD which supercedes to 5064080AE, then 5064080AF and finally NRNMREF 77. I'm not sure what's the scoop is with the last part number. I'm not a parts guys and couldn't begin to guess what's with the last number. All I do know is that this item is backordered National, so none are available.
In terms of what you will get if you were to order this system, seeing its not a kit, will be just the radio, nothing else. Other pieces (GPS antenna, etc) would have to be ordered seperately most likely.