Here's what I did for my Garmin zumo XT2, wired into the scooter:
1) RAM mirror stalk mount
2) RAM security bolt, so the mount can't be easily removed.
3) Motopumps security bolt, so the GPS can't be removed from the mount.
4) Power for the mount is run to the headlight, and I use taps to the low beam wires so the mount is powered only when the scooter is running.
The biggest hassle is just removing enough of the fairings to get the wiring to the mount.
