GSIS may refer to:
Education German Swiss International School, Hong Kong German Swiss International School (Ghana) Good Shepherd International School, Ooty, Tamil Nadu, India Josef Korbel School of International Studies (formerly named Graduate School of International Studies) of the University of Denver Gyeonggi Suwon International School, South Korea
Other uses Geoscience Information Society, United States Government Service Insurance System, Philippines GSIS Museo ng Sining, an art museum in Pasay, Philippines
See also GSI (disambiguation)