The GEAR GROOVE Garmin Mounts are sold out on the website, so I added the lock made by @Trunda_1437739 to a GEAR GROOVE model.
Included are 2 .3mf files; one in normal orientation with ironing on top level, but the upside down orientation (file called "_USD" in the end) has a better finish if used with a smooth print bed.
I printed on a BambuLab A1 Mini in normal PLA with tree supports and 5 walls, but could be printed in PETG for extra sturdiness.
You will need the screw from the top cap, and an extra at the bottom (2 x screws M6 x 12mm).
Make sure to secure your GPS with the elastic band around your steering wheel incase the print breaks during riding !!
Happy riding!!
The author remixed this model.

Added GEAR GROOVE