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| Introduced | April 15, 1994 |
|---|---|
| TLD type | Country code top-level domain |
| Status | Active |
| Registry | Guam Network Information Center |
| Sponsor | University of Guam |
| Intended use | Entities connected with  Guam |
| Actual use | Not very heavily used |
| Registration restrictions | Must have a contact in Guam |
| Structure | Registrations are accepted only at the third level beneath various second-level labels |
| Registry website | give |
.gu is the Internet country code top-level domain (ccTLD) for Guam.
Registrations are free of charge but are limited to people or companies with a contact in Guam, and are limited to third-level registrations beneath second-level names such as .com.gu. There has not been very much use of .gu addresses.