MGAS
| Acronym | Definition |
|---|---|
| MGAS | Motor Gasoline (US Navy) |
| MGAS | Mineralogisch Geologischer Arbeitskreis Saar eV (German: Saar Mineralogical Geological Working Group; Saarland, Germany) |
| MGAS | Middle Georgia Astronomical Society |
| MGAS | Mountsorrel Gas Appliance Services (UK) |