G13

G13 may refer to:
 * G-13 (cannabis), a type of cannabis
 * County Route G13 (California)
 * G13 Baobab Alliance, a political alliance in Benin
 * G13 carbine, a proposed Georgian firearm
 * Gate 13, a group of supporters of the Greek football club Panathinaikos
 * HMS G13, a Royal Navy G-class submarine
 * Logitech G13, a computer keyboard
 * Suzuki G13, an automobile engine
 * G-13, a Swiss postwar version of the Jagdpanzer 38 Hetzer tank destroyer
 * G13, a type of bi-pin lamp base