TGS

TGS is a three-letter acronym which may refer to:

== Educational establishments == Tadcaster Grammar School, North Yorkshire, England Takapuna Grammar School, Auckland, New Zealand The Geneva School, Winter Park, Florida Thetford Grammar School, Norfolk, England Think Global School, New York City, United States The Graduate School at Northwestern University. Illinois Tiffin Girls' School, Kingston upon Thames, England Tonbridge Grammar School, Tonbridge, England Toowoomba Grammar School, Toowoomba, Australia Tottenham Grammar School, London, England Townsville Grammar School, Townsville, Australia Trinity Grammar School, Melbourne, Australia Trinity Grammar School, Sydney, Australia