| Acronym | Definition |
|---|
| GWI | Gulf War Illness |
| GWI | Global Water Initiative (various locations) |
| GWI | Garden World Images (library of horticultural color photographs) |
| GWI | Goodwill Industries (various locations) |
| GWI | Global Water Intelligence |
| GWI | Great Works Internet |
| GWI | General Wage Increase |
| GWI | Genesee Wyoming, Inc. (freight railroads; various locations) |
| GWI | Guyana Water Inc |
| GWI | Groupware Incorporated (Vancouver, WA) |
| GWI | Galvanized Wrought Iron (pipes) |
| GWI | Gulf & Western Industries, Inc. |
| GWI | General Work Instructions |
| GWI | Games Workshop Interactive |
| GWI | Grinding Wheel Institute |
| GWI | Greenhouse Warming Index |
| GWI | Greenwood International, Inc. |