Columbia University Libraries now subscribes, courtesy of Sabinet, to digitized full text versions of South African government gazettes, from 1910 to the present. All current Columbia faculty and students can access and search the three online collections (on or off campus).
Retrospective Gazettes of South Africa, 1910-1993
http://clio.columbia.edu/databases/10425697
Government Gazettes of South Africa, January 1994 to present
http://clio.columbia.edu/catalog/10425708
Provincial Gazettes of South Africa, September 1995 to present
http://clio.columbia.edu/databases/10472679