Indian Army GD is a part of general duty section, where the real defence soldier exist, this includes the Rifleman, the land defence force, fighting troops, drivers, operators, gunner etc. And it also includes Army Service Crop (ASC), Army Medical Crop (AMC) on drivers, Ordnance, General Duties operators etc.
In order to join the Indian Army GD, the candidate must be Matriculation passed or some equivalent examination with the subject Science and English. This is the minimum education required to get entry in Indian Army GD.
The age group of candidate must fall between 17 1/2 to 21 years, as per original document of the candidate.