Government Gazette
A Government Gazette is an official vehicle for communication that is utilized by governments to record the business and proceedings of a government and publish public or legal notices.
In general
The practice is international, though the name of the publications may differ (it may also be referred to as an official gazette, official journal, official newspaper or official diary, etc.). Wikipedia's entry on the term Government Gazette describes it as "a periodical publication that records the business and proceedings of a government and has been authorised to publish public or legal notices. It is usually established by statute or official action and publication of notices within it, whether by the government or a private party, is usually considered sufficient to comply with legal requirements for public notice".[ https://en.wikipedia.org/wiki/Government_Gazette_of_South_Africa]
In South Africa
The South African Government Gazette (Afrikaans: Staatskoerant) is a gazette published by the South African national government as a tool with which it can bring issues of national importance to the notice of general public. It is a document of public record that contains information of a legal, administrative and general nature. The publication thereof dates back to the first British settlement of the Cape.
See further:
http://www.gpwonline.co.za/Gazettes/Pages/Government-Gazette.aspx
https://www.greengazette.co.za/
https://en.wikipedia.org/wiki/Government_Gazette_of_South_Africa