Owner Review: Casio G-Shock GM-5600 - a beater afraid of a beating by mesheryaroslav65 | Wrist Size: 18 cm 1 0 0 Just as the G-Shock model line subverted expectations for what a watch should be back when it was first released, this Casio G-Shock GM-5600 is an unexpected answer to what a G-Shock watch can be. uj2pp.