GTT

GTT may refer to:

Science and technology

 * Global title translation, in telecommunications
 * Glucose tolerance test
 * Google Translator Toolkit
 * Graphics translation table
 * Drop (unit), abbreviated gtt on prescriptions

Other uses

 * Georgetown Airport (Queensland), in Australia
 * Gone to Texas
 * Gruppo Torinese Trasporti, a public transport company in Turin, Italy
 * GTT Communications, Inc., an American telecommunications company