| Acronym | Definition |
|---|
| GIO | Government Information Office |
| GIO | Giovedì (Italian: Thursday) |
| GIO | Generic Interface for Operations |
| GIO | Graphics Input Output |
| GIO | General Input Output |
| GIO | Global Innovation Outlook |
| GIO | Government Insurance Office (Australia) |
| GIO | General Insurance Ombudservice |
| GIO | Geographic Information Officer |
| GIO | Government Information Online |
| GIO | Glucocorticoid Induced Osteoporosis |
| GIO | Geting Information Out |
| GIO | Guaranteed Insurability Option (life insurance) |
| GIO | General purpose Input/Output |
| GIO | Global Industrial Operation (GlaxoSmithKline) |
| GIO | Gymnazium Ivana Olbrachta (Semily, CZ, high school) |
| GIO | Green Investment Promotion Organization (Japan) |
| GIO | Global Infrastructure Operations |
| GIO | Game Interaction Object |
| GIO | General Inspection Office (Iran) |