Wikipedia
.gdn
.gdn (Global Domain Name) is a generic top-level domain name. It is a true generic top-level domain as it has no intended audience and can be used by anyone. The Registry Agreement was made official on July 31, 2014. Authorization(s) for release of reserved names was given on December 1, 2014.
The GDN Registry is the registry for the domain and is based out of Dubai, United Arab Emirates.