G-Shock Watch 2100 Rainbow Brick Wall GM-2100RW-1AER. G-Shock watches founder, Kikuo Ibe is an engineer who created the first shock resistant watch. For the first time, a watch could be exposed to impact and vibrations without suffering harm. The timepieces became equipped with various functionalities, which made them excellent for athletes, adventurers and military personnel. G-Shock watches feature atomic timekeeping, solar power generation, resistance to dust and cold.