This is a mix of the Ground Type GM and related mobile suits. The torso is from the Ground Type GM, the head and backpack from the GM Striker, the arms and waist parts from the Ez-8, the front armor from the Blue Destiny, and the legs from the Ground Type Gundam.

This unit was modified and added to the fleet following the earlier deployment of the Ez-RAID (from a previous work). At Augusta Base, production lines were almost completely shut down, with only a few generators still operational. Using the Ground Type GM as the base, and assembling it by gathering parts from various bases and factories to fill in the missing components, it achieved agility and mobility surpassing the GM. To further utilize these features...

RGM-79[G] High Agility Use Ground Type GM (Modified and Reconstructed) | すーぎー's Gunpla works