| Abbreviation | Definition |
|---|---|
| GMCS | Gunner's Mate Senior Chief Petty Officer |
| GMG1 | Gunner's Mate (guns) Petty Officer 1st Class |
| GMG2 | Gunner's Mate (guns) Petty Officer 2nd Class |
| GMG3 | Gunner's Mate (guns) Petty Officer 3rd Class |
| GMGC | Gunner's Mate (guns) Chief Petty Officer |
| GMGCM | Gunner's Mate (guns) Master Chief Petty Officer |
| GMGCS | Gunner's Mate (guns) Senior Chief Petty Officer |
| GMGSA | Gunner's Mate (guns) Seaman Apprentice |
| GMGSN | Gunner's Mate (guns) Seaman |
| GMGSR | Gunner's Mate (guns) Seaman Recruit |
| GMM1 | Gunner's Mate (missiles) Petty Officer 1st Class |
| GMM1 | Gunner's Mate (mounts) Petty Officer 1st Class |
| GMM1 | nner's Mate (missiles) Petty Officer 1st Class |
| GMM1 | nner's Mate (mounts) Petty Officer 1st Class |
| GMM2 | Gunner's Mate (missiles) Petty Officer 2nd Class |
| GMM2 | Gunner's Mate (mounts) Petty Officer 2nd Class |
| GMM2 | nner's Mate (missiles) Petty Officer 2nd Class |
| GMM2 | nner's Mate (mounts) Petty Officer 2nd Class |
| GMM3 | Gunner's Mate (missiles) Petty Officer 3rd Class |
| GMM3 | Gunner's Mate (mounts) Petty Officer 3rd Class |