View and Download Motorola GM300 Series basic service manual online. Professional Radio. GM300 Series Two-Way Radio pdf manual download. Also for: Gm140, Gm160. Learn how to program your Motorola Radius GM 300/GR300/M10/M120/M130 with DosBox and RSS. RadioDoctor (can be downloaded by joining the RadioDoctor Yahoo Group), and the Motorola Radio Service Software (RSS). May 15, 2014 - GM300 Programming Software that works with Windows XP. The most downloaded programming software on Hamfiles. Cable diagram programmig Motorola GM340. Thanks you Radio Doctor.