Age: >5000 years
Hair: salmon pink
Eye Color: emerald green
Affiliation: Kaiju Eugenicists (formerly), Dynazenon (currently)
Origin: China, later transported to the Sakuragaoka museum in Japan
Gauma was a former Kaiju user affiliated with the Kaiju Eugenicists but defected from them and fights against their Kaiju using Dynazenon.
(Source: Gridman Wiki, Ultraman Wiki)