GibraltarThe international vehicle registration code for Gibraltar is GBZ (Great Britain and Northern Ireland – Z). Vehicle registration plates, commonly known as number plates, are the mandatory alphanumeric or numeric plates used to display the registration mark of a vehicle. Monday-39 Countries-it seems that the season started AZ Azerbajdian (2016 II. Automobile codes required to identify the country of registration of the vehicle. This explains why these oval-shaped country stickers have never been.