To program a GP300, you cannot simply use a standard USB cable. You will need:
: Open the GP300.EXE file within your DOS environment. motorola gp300 programming
: Use the channel configuration screens to enter your desired RX and TX frequencies. To program a GP300, you cannot simply use
: A specific "RIB-less" (Radio Interface Box) cable that connects to the back of the radio in place of the battery. To program a GP300