GDT

• Great Dividing Trail, in Victoria, Australia
• Great Divide Trail, in the Canadian Rocky Mountains

• Gas discharge tube
• Gas Dynamic Trap, a Russian magnetic mirror used for fusion power research
• Geometric dimensioning and tolerancing, GD&T
• Global Descriptor Table, an x86 data structure
• Global distance test, to compare proteins
• Ground Data Terminal
• GDT or {{lang|de|Gerätedatentransfer}}, a medical data format; see xDT

• Ganvsig daighix tongiong pingimv, a romanization system for Taiwanese Minnan
• Goal-directed therapy, in critical care medicine
• Grand dictionnaire terminologique, an online terminological database
• JAGS McCartney International Airport, Turks and Caicos Islands
• Kungardutyi language
• MaK GDT, a diesel railbus
• Guillermo del Toro, director

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