G-Shock GA2000-1A2Carbon Core Guard structure From G SHOCK, the watch brand that is constantly setting new standards for unmatched timekeeping toughness, comes a new series of GA 2000 timepieces that are destined to become the next generation standard of the G SHOCK world. The three models of the GA 2000 lineup were designed with a utilitarian flair. A multidimensional face, a big front button, and other design elements create a powerful and tough design.