GTW may refer to:
- The rail company Grand Trunk Western Railroad
- The IATA code for Holešov Airport
- The station code for the Gatwick Airport railway station
- The NYSE code for computer manufacturer Gateway
- Stadler GTW, an articulated railcar manufactured by Stadler Rail.
- Gross trailer weight rating
- GTW (TV station), the callsign of a TV station in Geraldton, Western Australia
- Geosciences Technology Workshops