| Acronym | Definition |
|---|
| GDH | Gap Diffie Hellman |
| GDH | General Data Handler |
| GDH | Glucose Dehydrogenase |
| GDH | Global Digital Heritage (St. Petersburg, FL) |
| GDH | Group Diffie-Hellman |
| GDH | Gove District Hospital (Australia) |
| GDH | Geothermal District Heating (alternative energy) |
| GDH | Great Dark Horde (Society for Creative Anachronism) |
| GDH | Gonzo Digimation Holdings (Tokyo, Japan marketing company) |
| GDH | Gestão do Desempenho Humano (Portuguese: Management of Human Performance; Brazil) |
| GDH | Gas Ducted Heating (Australian property sales) |
| GDH | Ground Data Handling |