| Abbreviation | Definition |
|---|---|
| GLULAM | GLUe-LAMinated |
| GMCI | Green Mechanical Construction Inc |
| GMP | Goat Manure Plaster |
| GMYP | Grade Mark Yellow Pine |
| GOD | Generator Operator and Destroyer |
| GP | Gravity Pipe (construction) |
| GR | Galvanized Roofing |
| GRC | Glass Reinforced Concrete |
| GRCS | Ground Rigging Control System |
| Grt/Rm | Large Formal Reception Room |
| GS | Grade Stake |
| GS | Grade Stamped |
| GS | Grid Standpipe |
| GSD | Gravity Spillway Dam |
| GSFT | Glazed Structural Facing Tile |
| Gst/BR | Guest Bedroom |
| GSWH | Gas Storage Water Heater |
| GT | Green Timber |
| GTC | Golden Triangle Construction |
| GTHBAUDI | Greater Toronto Home Builders Association-Urban Development Institute |