...Thousands of companies that use the pseudo-top-level-domain .gb.com have gone offline due to a legal fight between the registry and its founder.
CentralNIC sells third-level gb.com domains as a “Great Britain” alternative to .co.uk. A Google search reveals a great many small businesses use the extension for their web sites.
Fight over gb.com claims thousands of victims | DomainIncite - Domain Name News & Opinion