Motorola holds copyright on all its CPS and RSS. Distribution without license is illegal. However, because the GM950 Plus is discontinued (since the mid-2000s), many hobbyists use archived copies under fair use for maintaining their own equipment. For commercial use, upgrading to a modern radio with legally obtainable software is the correct path.
No amount of "top" software will work without the correct programming cable. The GM950 Plus uses Motorola’s proprietary 16-pin accessory connector on the rear. You have two main cable options:
Once you have the cable, you will also need a stable power supply (12V DC, 5A minimum) for the radio while programming. motorola gm950 plus programming software top
Disconnect the computer, hook up an antenna (or a dummy load for testing), and press the PTT. You should see the TX light illuminate, and you should hear static on the other channels.
| Feature | Supported? | Notes | |--------|------------|-------| | Frequency programming | ✅ Yes | VHF: 136–174 MHz, UHF: 403–470 MHz (split-dependent) | | TX power adjustment | ✅ Yes | High/Low (25W or 40W/45W depending on model) | | Squelch type | ✅ Yes | Carrier, PL (CTCSS), DPL (DCS) | | Scan lists | ✅ Yes | Up to 10 channels per list, priority scan | | Time-out timer (TOT) | ✅ Yes | 0–120 seconds | | Signalling | ✅ Yes | MDC1200 (limited: PTT ID, emergency, radio check) | | Channel spacing | ✅ Yes | 12.5 kHz or 25/20 kHz (narrow/wide) | | Busy channel lockout | ✅ Yes | | Motorola holds copyright on all its CPS and RSS
Not supported:
Once the codeplug is loaded, you will see a spreadsheet-like view of the channels. Once you have the cable, you will also
If you cannot access Motorola CPS, there are a few alternatives, though they are not truly "top" tier:
The original GM950 Plus programming tool was DOS RSS. It runs in true DOS or DOSBox on modern machines.