GLS
- GBAS landing system
- GLS Bank
- GLS University
- GLS light bulb
- General Logistics Systems
- Generalized least squares
- Genesis Lease
- Georgetown Leadership Seminar
- Glaisdale railway station
- Glasgow Literary Society
- Global Leaders' Summit
- Global Linguist Solutions
- Global location sensor
- Gloucestershire
- Glutaminase
- Government Legal Service
- Gray leaf spot
- Guided local search
- Guy L. Steele Jr.
- Mercedes-Benz GLS
- Scholes International Airport at Galveston
- University of Chicago Graduate Library School