Designed as a twin seater, twin engined recomnnaisance bomber, the G4 was powered by two 80hp rotary Le Rhone engines. The observer was armed with a flexibly mounted machine gun, the .303 inch Lewis gun being a favourite. It was also capable of carrying a 220kg bombload. The G4, whilst popular with many of its crews, proved to be lacking in the rapidly developing air race of the 14-18 war. The wing warping method of control was inadequate when compared to aileron equiped machines and by the end of 1916 the G4 was little used.