Following his latest argument with the Green Lanterns, Guy went on to become one of the charter members of the new Justice League (later Justice League International). He considered himself leader, though his teammates didn't recognize his claim to the title. Alongside Batman, Black Canary, Blue Beetle, Captain Marvel, Doctor Fate, Doctor Light, the Martian Manhunter, Mister Miracle and Oberon, Guy quickly made a bad impression. Batman appeared to be one of the few people able to keep Gardner in line.
The League's first case had actually been set up by Maxwell Lord. A group of terrorists at the UN were stopped by the Justice League earning them instant recognition. Their next case involved a return to the U.S.S.R. for Gardner as they came into conflict with the Rocket Red Brigade. The Justice League had been sent to the Soviet Union to block the Heroes of Angor from dismantling the Soviets' nuclear arsenal.
New members, such as Booster Gold, joined the League, but command of the team was still a sore spot for Guy. He took off his ring to fight Batman but was KO'ed with one punch from the Dark Knight. Coming to a while later, he hit his head on the underside of console while trying to find his ring.
Green Lantern Hal Jordan was visited by Maxwell Lord to assist the new Justice League, but Jordan felt the participation of Gardner would screw up the reputation of the League. Though Lord wanted Jordan's help, he didn't want the veteran Green Lantern's advice.
Hal and him had a knock out fight after that for Guys ring and he gave it to Hal after losing then went hunting for Sinestro's yellow ring with the help of Lobo and this is the outfit he wore.
Think the original Parallax Guy Gardner