GTU may mean:
- GT University School of Supernatural Ministry
- Georgetown Municipal Airport
- Georgian Technical University, largest polytechnic high school in the country of Georgia
- Gujarat Technological University, largest University in Gujarat, India
- Graduate Theological Union, a consortium of independent California theological education institutions
- Grand Touring Under, a class in the IMSA GT Championship
- Chevrolet Beretta GTU, see Chevrolet Beretta