Some articles on gaogaigo:

Mechanoid (Gao Gai Gar) - GGG and Green Planet Mechanoids - GaoGaiGo
... StealthGao II rather than III is that GaiGo cannot produce Program Rings, forcing GaoGaiGo to use the less powerful Phantom Rings ... that Ikumi Kaidou's J-Jewel energies will supercharge the G-Stones embedded in GaoGaiGo - this may be based on the effect seen with the jointly operated King J-Der ...