GTG
GTG is an abbreviation for:
- All -day high school
- Gas turbine generator, engl. APU (Auxiliary Power Unit), auxiliary power unit , in aviation and vehicle technology
- Gate to gate , Eng. for "from gate to gate", an abbreviation in aviation
- Generative transformation grammar , linguistic theory for the description of sentence structures
- Genetic Technologies , listed company from Australia
- Genetic Engineering Act (Austria)
- History and theory of design , Institute of the University of the Arts Berlin
- Society for History of Technology e. V.
- Getreidegasse (Salzburg) , shopping street in Salzburg
- Getting Things Gnome , software for managing tasks and to-do lists
- Got to go , engl. for “I have to go”, one of the abbreviations in internet jargon
- Grantsburg Municipal Airport , a municipal airport in Grantsburg in the Burnett County US state of Wisconsin according to the IATA code
- Grazer Tramway Gesellschaft, forerunner of the Grazer Verkehrsbetriebe or Graz AG Verkehrsbetriebe, former name of the Graz Linien Holding
- Gray to gray , measure of the reaction time of flat screens, see reaction time (flat screen)
- GTG bands , individually identifiable bands of the chromosomes in the karyogram after special staining (G-bands by trypsin using Giemsa)
- GTG representations , equation-table-graph representation in mathematics, computer science, CAS
- GTG service group , listed company from Kassel
- Guanine – thymine – guanine , sequence of DNA and RNA, see start codon
