| Acronym | Definition |
|---|
| GtMN➣Great Malvern (station code; First Great Western Ltd.; UK) |
| GtMN➣Gay Teen Meeting Network (Young Adult Services of Pennsylvania) |
| GtMN➣Groupware-Based Topic Map Navigator (software) |
| GtMN➣Groupement Tactique Multinational (French: Multinational Battle Group; NATO) |
| GtMN➣Técnico do Grupo de Manutenção (Portuguese: Technical Maintenance Group; AES Tiete; Brazil) |