GDT

The abbreviation GDT can refer to:
* [http://gdt.sourceforge.net Game Developers Toolkit] , library for C++ to develop 3D games
*Gas Discharge Tube, an electrical component with electrodes separated by a specific gas, tending to arc or breakdown at a specific voltage
*GDT, the former ticker symbol for Guidant Corporation, now part of Boston Scientific
*General Department of Taxation of Vietnam
*Geographic Data Technology, a map data company
*Geometric dimensioning and tolerancing, a symbolic language used on engineering drawings
*Global Descriptor Table, a data structure used in some computer processors manufactured by Intel
*Global distance test, a metric used in protein structure prediction for judging the similarity of multiple protein structures with the same amino acid sequence
*"Gloucester Daily Times", a daily newspaper in Massachusetts
*Gracies Dinnertime Theatre, a publication based in Rochester, NY
*Grand dictionnaire terminologique, an online terminological database
*Greenwich Daylight Savings Time, equivalent to British Summer Time
*Guillermo Del Toro, creator of Pan's Labyrinth