Motorola Solutions holds the copyright to this software. While you may find "free" downloads on third-party websites or amateur radio forums, the software is technically proprietary. To stay legal and support the manufacturer, it is recommended to purchase the software license from a Motorola Solutions dealer or the official website. However, for legacy radios like the GM338, the software is often considered "abandonware" by the radio community and is widely shared on hobbyist sites.
: The GM338 programs through the front 8-pin RJ45 microphone port. You need an RJ45 to USB or RJ45 to DB9 Serial programming cable.
Look for version R06.12.05 or similar, as these are widely compatible with the GM338 series. Ensure you match the software region (AA for North America, AZ for Asia/Pacific, LA for Latin America) with your radio's regional code. What You Need for Programming
Modern PCs require a USB-to-RJ45 programming cable. Ensure the cable features an authentic FTDI or Prolific PL2303 chipset. Cheap, counterfeit chips frequently drop connections midway through a write cycle, bricking the radio. motorola gm338 programming software free best
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The radio will emit a long beep and restart once the programming is successful. Troubleshooting Common Programming Errors
Click the icon (the radio icon with an arrow pointing away from it) or press Ctrl + R . Wait for the progress bar to finish. Motorola Solutions holds the copyright to this software
Now go get that GM338 programmed. Your radio is waiting to come back to life.
While Motorola officially requires a paid MOL (Motorola Online) account to purchase software, many radio hobbyists and archives host older, legacy CPS versions for free public download.
Customize the programmable P1-P4 buttons for shortcuts like high/low power or scan. However, for legacy radios like the GM338, the
If the process is interrupted, the radio may display an "EEPROM Error." Flash your saved backup codeplug to restore operation.
Complete Guide to Motorola GM338 Programming Software The Motorola GM338 is a legendary, rugged mobile two-way radio used globally for commercial, emergency, and amateur radio operations. To customize frequencies, privacy codes, and signaling features, you need the correct Customer Programming Software (CPS).
Motorola GM338 Programming Software: How to Program Your Radio Like a Pro
Older setups required a Radio Interface Box (RIB) to manage voltage levels. Modern "ribless" cables feature built-in FTDI chips that convert USB signals directly to the radio's logic levels, eliminating the need for an external box.
When searching for the , you are specifically looking for Motorola GM338 CPS , typically version R06.12.00 or thereabouts.