Here is a picture of Gang Green from an article on The Music City Open out of the September 1988 issue of Action Pursuit Games.
Gang Green was based out of Eastern Massachusetts and competed heavily in east coast tournaments in the late 80s.
I spoke with Marcus Neely, an original partner in Montneel Designs (creators of the Z-1, Z-2 and Mega Z), a couple months back about Gang Green, the Z-1, the Falcon, Legend and Guardian.
Marcus left his first team, Beast of the East (likely 1988?), to play with Gang Green because they were more dedicated to serious tournament play. Marcus became team captain of Gang Green in 1989.