MGS may refer to:
Schools Maidstone Grammar School, Kent, England, UK Manchester Grammar School, England, UK Mayo Clinic Graduate School of Biomedical Sciences, U.S. Melbourne Grammar School, Australia Meldorfer Gelehrtenschule, Germany Middleton Grange School, New Zealand
Science Magnesium sulfide, an inorganic chemical compound Mars Global Surveyor, an American spacecraft launched in 1996 Medial gastrocnemius strain, an injury of the gastrocnemius muscle in the calf Modelling of General Systems, a domain-specific language for biological systems Modified Gram-Schmidt, a mathematical method for orthogonalizing a set of vectors; see
Video games Metal Gear Solid, another name for the 1987 stealth action video game series Metal Gear Metal Gear Solid (1998 video game), a stealth action video game in the Metal Gear series
Other uses M1128 mobile gun system, an armored fighting vehicle Microsoft Game Studios, a multinational video game and digital entertainment company now called Xbox Game Studios MGS (TV station)
See also Methodist Girls' School (disambiguation) MG (disambiguation)