The Popular Radio. The Popular Radio is the simple two-way radio solution for professionals who need to stay in contact. The GP340 can easily increase productivity by keeping users . Dimensions: H x W x D (mm). With standard The GP340, one of the market-leading radios in Motorola's. Professional Series . portable users requiring a high-quality radio. . Dimensions: The Motorola GP340 is the industry standard analogue two way radio. One of the world's best selling radios and has proven to be one of the world's strongest. Motorola Analog Professional Portable Radio GP340 is a simple, yet flexible radio for users needing up to sixteen different communication channels and.