Specifically the Professional GP300/GM300 Series CPS .
As of 2025, CHIRP does not officially support the GM360. Experimental builds have partial support but often corrupt MDC1200 settings. Not recommended. motorola gm360 programming software
For purists, find gm360rss.exe . Boot into FreeDOS or true DOS 6.22. Use a real serial port (no USB adapters). Commands are keyboard-driven. High risk of bricking. Specifically the Professional GP300/GM300 Series CPS