> It is staggeringly unlikely that you would ever have encountered a .gb domain in the wild. The only domain which is registered, though inactive, is hmg.gb - standing for His Majesty's Government. The domain was originally created in the mid 1980s, and abandoned at some point in the 1990s. There are no active domains which use .gb and today, the government only uses .gov.uk for its domains.

Third paragraph.