| Abbreviation | Definition |
|---|---|
| GLIS | Greater Lansing Islamic School |
| GLPS | Godfrey Lee Public Schools |
| GLPS | Grand Ledge Public Schools |
| GLSD | Greater Latrobe School District |
| GLSD | Green Lake School District |
| GLWH | Grace Lutheran Church and School, Winter Haven, Florida |
| GMAS | Georgiana Molloy Anglican School |
| GMCS | Gallup McKinley County Schools |
| GMCS | Garrett Memorial Christian School |
| GMCS | Gettysburg Montessori Charter School |
| GMES | Garnet Mesa Elementary School |
| GMHS | Garner Magnet High School |
| GMHS | General McLane High School |
| GMHS | George Mason High School |
| GMHS | Great Mills High School |
| GMHS | Green Mountain High School |
| GMHS | Groveport Madison High School |
| GMIS | Gandhi Memorial International School |
| GMMS | Georgia Morse Middle School |
| GMMS | Golden Meadow Middle School |