The Desert GM could be considered the Federation's response to Zeon's MS-06D Zaku Desert Type and was based on the RGM-79F GM Land Combat Type . The Desert GM has covered joints and extra intake valves to better deal with the intense heat and dust of the desert. It also features reactive armor mounted on several parts. Similar to the GM Land Combat Type, the Desert GM is armed with a beam saber, railcannon and an optional beam spray gun.
Part of the GM enhancement plan, a modification to the standard GM that was developed in order to operate in both desert and frigid regions. While the development of the GM had proven fairly successful in holding battle lines, the gap in pilot experience in skirmishes was clearly apparent, and the rapid training of pilots and adaptation to localized battles remained a top priority. In order to adapt the GM for desert battles, all the joints and ventilation ducts received anti-dust treatment. Furthermore, a revolutionary plan was purposed to change all the armor on the MS rather than risk the use of heavy armor that would restrict mobility on exposed desert terrain.