| Acronym | Definition |
|---|
| GAI | Graphic Arts Institute (various locations) |
| GAI | Guaranteed Annual Income |
| GAI | Gross Annual Income |
| GAI | General Applet Interface |
| GAI | Giustizia e Affari Interni (Italian) |
| GAI | General Artificial Intelligence |
| GAI | German Archaeological Institute |
| GAI | Guild of Architectural Ironmongers |
| GAI | Global-Tech Appliances Inc |
| GAI | Great American Insurance |
| GAI | Global Atmospherics Inc |
| GAI | General Ability Index |
| GAI | Germanic-American Institute |
| GAI | Geophysical Association of Ireland |
| GAI | Glutaric Aciduria Type I (disorder) |
| GAI | General Aircraft Information |
| GAI | Grease, Aircraft, and Instruments |
| GAI | Gimbal Angle Indicator |
| GAI | Global Authentication Incorporated |
| GAI | General Accounting Instructions |
| GAI | GPETE Auxiliary Item |
| GAI | Montgomery Co. Gaithersburg, MD (airport code) |
| GAI | Global Assistance, Inc. |
| GAI | Gosudarstvennaja Avtomobilnaja Inspekstija (Soviet/Russian Traffic Police) |