The Re-GZ was developed by Anaheim Electronics as a simplified variant of the company's masterpiece, the MSZ-006 Zeta Gundam. Consideration for mass-production was taken into account, and it aimed for a lower cost than the limited-production Zeta Plus series.The basic design of Re-GZ's body follows that of the Zeta Gundam's MS form while parts such as the arms are shared with the RGM-89 Jegan. The transformation mechanism was considered too costly to mass-produce, and was removed in favor of a special Back Weapon System (BWS), which the Re-GZ can dock with to change to a Waverider-like form.
Special optional parts, it is equipped with a mega beam cannon in the nose and beam cannons on both sides. Additionally, it carries propellant tanks beneath the wings. It is possible to mount missile launchers in underwing pylons. By mounting the BWS, the Re-GZ can operate as a heavy space fighter with emphasis on space combat. While it is possible to separate the BWS during combat, it cannot be docked with afterwards.