Just took delivery on a new '18 and it looks like that bar would be a good choice for the gps, especially given the accy plug right next to it.
The mount I have is a Ram and considerably too big. Has anyone McGivered a solution?
I made my own GPS support with some aluminum flat bar and some mounting brackets I found on line. I used the Garmin hard mount for my 650 Montana.
If your interested in making something like this I can send you a little more detail.
I also added the windshield supports by Propsoto and the dash infill by Ramsebella. Both are inmates on this forum.