GMG

GMG may refer to:


 * Gamecock Media Group
 * Garden Media Guild (formerly the Garden Writers' Guild), a British trade association for garden writers, photographers and broadcasters
 * Generalized Myasthenia Gravis
 * Girls Make Games, an American organization
 * Gizmodo Media Group
 * Global Migration Group, an inter-agency group working on international migration issues
 * GMG Airlines, an airline of Bangladesh, not in operation
 * GMG Community School District in Iowa
 * GNU MediaGoblin
 * Good Morning Gloucester, a daily report of life on the docks of "America's Oldest Seaport"
 * Green Man Gaming, an online retailer for PC video games
 * Grenade machine gun, an automatic grenade launcher
 * HK GMG, an automatic grenade launcher made by Heckler & Koch
 * Gregor-Mendel-Gymnasium, a college in Amberg/Germany
 * Guardian Media Group
 * GMG Radio, a division of the above