The garmin RV 760 LMT has a optional back up camera available that wirelessly connects to the Garmin. I have the BC-20 camera attached to my rear ladder and a wireless transmitter attached beneath the overhang of my fiver. The camera works via the GPS display.
There is an on screen icon that allows you to toggle between rear camera view and GPS view.
I completed installation a week ago and gave it a test run this pass weekend. Unit worked great. Back up camera and GPS all in one display.
For me this camera option sets the Garmin apart from the others.