| Abbreviation | Definition |
|---|---|
| MGNS | Monona Grove Nursery School |
| MGOS | Metamorphosis Greek Orthodox School |
| MGPS | Mahathir Global Peace School |
| MGRS | Mt. Greylock Regional School |
| MGS | Magnificent Girls School |
| MGS | Manchester Grammar School |
| MGS | Melbourne Grammar School |
| MGS | Methodist Girls School |
| MGS | Midlands Graduate School |
| MGSG | Mayfield Grammar School Gravesend |
| MGSH | Maple Grove Senior High |
| MGSM | Macquarie Graduate School of Management |
| MHCS | Margaret Harris Comprehensive School |
| MHCS | Murray Hill Chinese School |
| MHHS | Medicine Hat High School |
| MHHS | Morris Hills High School |
| MHHS | Mountain Home High School |
| MHHS | Mt Hope High School |
| MHIS | Mutiara Harapan Islamic School |
| MHMS | Mary Harper Middle School |