GRS

GRS may refer to:

Education

• Geneva Reformed Seminary, in Greenville, South Carolina
• Gifted Rating Scales, an educational assessment test
• Great River Charter Montessori School, in St. Paul, Minnesota

Science

• Gamma-ray spectrometer
• Gamma Ray Spectrometer (2001 Mars Odyssey), an instrument on 2001 Mars Odyssey
• Genetic risk score
• Great Red Spot, a feature on Jupiter

Other uses

• General Railway Signal, a former American railway signaling company
• Sex reassignment surgery, also known as genital reassignment surgery, gender reassignment surgery, or genital reconstruction surgery
• The Gerry Ryan Show, an Irish radio show
• Global Resource Serialization, part of the IBM z/OS operating system
• Government Rubber-Styrene (GR-S) produced by the United States Synthetic Rubber Program during World War II
• Grand Rapids Symphony, in Michigan
• Grassroot Soccer, an international health organization
• Graves Registration Service, now Mortuary Affairs, a service of the United States Army
• Gresi language
• Grosseto Air Base, in Italy
• Guilford Rail System, now known as Pan Am Railways, an American railway holding company
• GRS Riflestocks, a Norwegian firearm stock manufacturer
• GRS, acronym for Gauche républicaine et socialiste, a French political party
• Gabungan Rakyat Sabah, a Sabah, Malaysia political party.