G-1 means Army or Marine Corps Component Manpower or Personnel Staff Officer Army Division or Higher Staff, Marine Corps Brigade or Higher Staff in Military
Similar to G-1
2E - Role 2 Enhanced 2IC - Second In Command 2LM - Role 2 Light Maneuver 2LT - Second Lieutenant 2M - Micro Miniature 2W - 2-Wire 3-D - Three-Dimensional