>>23586297
In a flashback chapter of Zeta Define, they go a little more crazy. Char meets with Anaheim Electronics in maybe UC 0085 or 0086, finalizing their plans for their new equipment. Char and friends are satisfied with how the Argama is taking shape, but are now asking about new mobile suits, specifically Dom-style MS. AE just so happens to have a spare GP02 on hand that's been modified with newer parts, and Char takes it for a test flight. He's not really happy with the basic design, and has further requests.
Anyway, the rest of the chapter plays out by having a newer younger employee take over the reins of the project from the old guy, and she develops the Gamma Gundam prototype based on the changes and feedback.