The definitive archive for hardware modifications, pinouts, and manual documentation. Essential Programming Hardware
Unlike modern radios that use a simple USB cable, the GM338 utilizes a proprietary Motorola data protocol. motorola gm338 programming software free best
Downloading an incorrect region or an outdated version of the CPS may result in a "Codeplug Version Not Supported" error, preventing you from reading or writing to your radio. Trusted Community Hubs Trusted Community Hubs Source a newer version of
Source a newer version of the CPS or match the regional firmware prefix (e.g., AZ). Using an LA (Latin America) or EMEA (Europe)
The GM338 is predominantly an Asia-Pacific (AZ) region model. You must use the AA or AZ regional versions of the software. Using an LA (Latin America) or EMEA (Europe) CPS will result in a "Radio Not Supported" error.
Set up scan lists and emergency calling features. Is There a "Free" Version?