To download and install the Motorola GM300 CPS software on Windows 10:
I successfully got the running on Windows 10 Pro 64-bit , and it programs radios perfectly. If you’re expecting a modern, USB-plug-and-play experience, temper expectations – this is authentic 1990s Motorola software, and it’s rock solid once set up correctly . motorola gm300 programming software windows 10 full
Ensure your USB adapter is assigned to COM1 or COM2 in the Windows Device Manager; the legacy software often cannot "see" ports higher than COM4. To download and install the Motorola GM300 CPS