General Officer Commanding (GOC) is the usual title given in the armies of Commonwealth (and some other) nations to a general officer who holds a command appointment. Thus, a general might be the GOC II Corps or GOC 7th Armoured Division. A general officer heading a particularly large or important command may be called a General Officer Commanding-in-Chief (GOC-in-C).
The equivalent term for air force officers is Air Officer Commanding (AOC).