Gary Godan operates within the Gilgamesh Confederation military as part of Nol Berkhoff's experimental AT squad. On missions across Galeade, he fights alongside Chirico Cuvie, Glenborash Droka Zaki, Dare Kochak, and Berkhoff. Godan exhibits aggressive tendencies, notably punching Dare Kochak after operational failures endanger the unit. His combat approach relies on direct and brutally efficient threat elimination.

Godan’s concealed history surfaces when he is exposed as the "Shirasko Reaper," a designated war criminal. This revelation triggers an attack by the Gilgamesh Purification Committee (GPC), which targets the squad’s transport and demands his surrender. During the assault, Godan kills the GPC agent who sabotaged their aircraft and massacres the pursuing GPC snipers. These actions starkly demonstrate his lethal proficiency and the violent repercussions of his hidden past.