The Ze'Gok is created to serve as the control and mobility unit of the Mobile Diver System (MDS), a special weapon designed to enter the atmosphere from satellite orbit and carry out surprise attacks against enemies on the ground, sea, and air. Besides the control and mobility unit, the MDS is also composed of a Logistics Weapon Container (LWC), a container for mass weapon transport.
The control and mobility unit was originally meant to be a dedicated machine, but as the plan was brought ahead of schedule, the Z'Gok was used instead. It was easy to retrofit the amphibious Z'Gok into a control and mobility unit as it already had thermonuclear hybrid engines for both aquatic and atmospheric use, and its various parts are connected by pressure-resistant joints. Furthermore, the use of Z'Gok in the field is decreasing due to the Principality of Zeon's retreat, so discarding the mobile suit after use has little impact.
The body of Ze'Gok is fitted with boosters, propellant tanks as well as pylons for attaching the LWC and the high propulsive power Dive Maneuver Unit. Its right arm is fitted with a sensor unit in place of the original Z'Gok's mega particle cannon. It has a United Maintenance Plan-compliant cockpit instead of the one from the Z'Gok. This cockpit is modified into a double seater type, and although the rear seat design is simple, it is capable of fire control through the attached monitor.
After the MDS is dropped from orbit and all the weapons are utilized, the LWC is discarded. The Ze'Gok is then dumped after its pilot is recovered by a Gaw aircraft carrier. In the end, only the pilot returned to space after the mission was completed.