GMR may refer to:

• Gahmar railway station, in Uttar Pradesh, India
• Gambir railway station, in Jakarta, Indonesia (station code GMR)
• Georgia Midland Railroad, in Georgia, United States
• Glenreagh Mountain Railway, in New South Wales, Australia
• Golden Myanmar Airlines, a Burmese airline
• Totegegie Airport, in French Polynesia

• GMR (cryptography), a digital signature algorithm
• GMR (magazine), a video game magazine
• The Great Movie Ride, a defunct dark ride formerly located at Disney's Hollywood Studios at the Walt Disney World Resort in Bay Lake, Florida.
• Genetics and Molecular Research, an academic journal
• BBC GMR, now BBC Radio Manchester
• Galápagos Marine Reserve, the protected waters around the Galápagos Islands
• General Motors Research Laboratories, a division of General Motors Corporation
• GEO-Mobile Radio Interface, a standard for satellite phones
• Giant magnetoresistance, a quantum mechanical magnetoresistance effect
• Giant monopole resonance, in physics, a form of giant resonance
• Glass Mountain Records, an American record label
• GMR Group, an Indian infrastructure company
• Golden-mantled rosella (Eastern rosella), an Australian parrot
• Great Man-Made River, an irrigation project in Libya
• Great Midwest Relay, now the Madison Chicago Relay, a 200-mile relay race
• Groupe mobile de réserve, paramilitary unit of Vichy France