Gog was one of the protectors of “Earth Prime” before time was broken in the war between Tor and Rebborizan. As consequence of the conflict, Gog was zee-volved into a deformoid monster, under the control of Tor.
Gog is an analog of the Atom, with the growing traits of Marvel’s Giant Man. How much his story resembles or differs from his earth 0 counterpart is unknown, same as his nature on that universe.