upgrading the GH615 to a GH625
Globalsat released a beta firmware for the GH515 that basically upgrades the software to that of the GH625, meaning lap support and configurable screen, and more. Some first impressions here.
The firmware is a beta, with all associated risk. Update at your own risk.
08/09/19: F-TGH-2A-0809101.GHX - works with both B and M models
If you have a newer Version, please send it in (speigei gmail com).