GRS

• Gabungan Rakyat Sabah (GRS), a political coalition based in Sabah, Malaysia
• Gagasan Rakyat Sabah (also known as PGRS), a political party based in Sabah, Malaysia and also a main component party of Gabungan Rakyat Sabah (GRS) coalition.

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

• 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

• Global Response Staff, a security role in CIA's Directorate of Support branch
• Graves Registration Service, now Mortuary Affairs, a service of the United States Army

• General Railway Signal, a former American railway signaling company
• Gender-affirming surgery, also known as gender reassignment 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
• 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
• Gauche républicaine et socialiste, French political party

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