The G20 is an international group of 20 major economies. The term is also used to refer to any of the G20 summits. G20 may also refer to: * G20 developing nations, a trade negotiations bloc of 20+ developing nations * G20 Research Group at University of Toronto * BMW 3 Series (G20) * G20 (inch units) command in G-code * G20 version of the Infiniti G-series (Q40/Q60) car * G20 version of the Chevrolet Van * G20 model of car manufactured by Ginetta Cars * Ginetta Junior Championship motor racing series formerly G20 Cup * G20 Schools, an association of secondary schools * Glock 20, a 10mm Auto pistol * County Route G20 (California) * G20 Qingdao–Yinchuan Expressway, in China * Les XX, a group of twenty Belgian painters, designers and sculptors in 1883 * Bendix G-20, an early Ben