GM 300 Radio Specifications

Written by jade blue
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GM 300 Radio Specifications
You can connect a series of GM300 radios for crossband operation. (radio image by dinostock from

Motorola's GM300 is a two-way mobile radio popular with recreational vehicle enthusiasts and other motorists who use the GM300 to communicate with one another across several frequencies and eight or 16 channels, depending upon the specific model. Although the GM300 has been discontinued, Motorola dealers still stock replacement parts and accessories for the radio.


The GM300 radio consists of a simple black casing. The radio weighs in at almost 1.81 Kilogram and features a two digit light emitting diode display. The GM300 is 8 inches wide, seven inches deep and two inches in height. The radio requires 10.8 to 15.6 volts of direct current electricity to function.


GM300 radios run on a walkie-talkie frequency at a maximum distance of six miles. Users have access to eight or 16 channels using one radio. Users can attach multiple radios for crossband operation and access to a range of communication channels. The GM300 receives the following frequencies: very high frequency: 136-162 megahertz / 146-174 megahertz and ultra high frequency: 403-433 megahertz/438-470 megahertz/465-495 megahertz/490-520 megahertz.

Programming Capabilities

GM300 users can program unrestricted private lines and digital private lines. Channels with activity are monitored through a priority channel scan. A Time-out feature disconnects channels that reach their transmission limit. The GM300 has a reputation among users for being easily programmable.

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