GGT may refer to:
Biology and medicine
- Gamma-glutamyltransferase, an enzyme that catalyzes the reaction between a peptide and an amino acid
- Glutathione hydrolase, an enzyme that hydrolyzes glutathione
- A codon for the amino acid Glycine
- Germline gene therapy, to treat genetic diseases
Language
- Gitua language, spoken on New Guinea
Transport
- Exuma International Airport, The Bahamas (IATA:<code>GGT</code>)
- Golden Gate Transit, a public transport system in California, U.S.
See also
- Galactolipid galactosyltransferase (GGGT), an enzyme in glycerolipid metabolism