The RGM-79 GM is a mobile suit that appears in the manga Mobile Suit Gundam: The Origin.

A mass-produced MS of the Earth Federation Forces manufactured in Jaburo. Unlike the Guncannon, which specialized in medium-range firepower support without focusing on MS battles, this machine is based on the RX-78-02 Gundam, which was basically designed as a multirole machine that can be equipped with various equipment changes depending on the battle situation, such as anti-ship and anti-fighter battles, while assuming MS battles as its "main weapon". In order to rebuild the strength of the Federation Forces as quickly as possible, its structure was simplified and costs were reduced with an emphasis on productivity, so it is a step behind the Gundam, especially in armor strength and reaction speed. Even so, it has become an MS with sufficient performance to serve as a mainstay weapon, and with data from actual battles with the Gundam inherited, it has been completed as a machine with specifications that exceed those of the Zaku II, albeit slightly. It is also equipped with a beam spray gun and a core pod as standard equipment, making it suitable for pilots with low skill levels.