GTT or gtt may refer to:
Science and technology Global title translation, in telecommunications Glucose tolerance test, a medical test Google Translator Toolkit, a web application Graphics translation table, an I/O memory management unit Global temporary table, a concept used in database technology (Oracle, SQL Server etc) Drop (unit) (gtt), an approximated unit of measure of volume
Other uses Georgetown Airport (Queensland) (IATA code), Australia Gone to Texas, Americans emigrating to Texas in the 19th century Gruppo Torinese Trasporti, a public transport company in Turin, Italy GTT Communications, Inc., an American telecommunications company GTT Group, a French engineering company