Company profiles and links to respective websites are alphabetically listed.
* Companies including "NTT" as part of their name are listed with "NTT" omitted.
- GCT Telecommunication (HK) Ltd
- GISA GmbH
- GK Communications Group Ltd
- Global Ideas Direct LLC
- Global Telekonferans Hizmetleri Ltd Sirketi
- Globesoft Services Pte Ltd
- GOLD kiwi Media SA
- Gyron Internet Ltd