GSB may refer to:
Education German School Brooklyn Gill St. Bernard's School, in Gladstone, New Jersey Government School, Bidhwan, in India Stanford Graduate School of Business University of Chicago Graduate School of Business (now known as Chicago Booth)
Science Geological Survey of Bangladesh Geological Survey of Belgium Green sulfur bacteria
Other The IATA airport code for Seymour Johnson Air Force Base Gaud Saraswat Brahmin, an Indian Brahmin community Gisborne railway station, Australia Giusfredi–Bianchi, a cycling team Gold Star for Bravery, an award of South Africa Government Savings Bank (Thailand) Granada Sky Broadcasting, a British television company Grivel Scarpa Binding, in mountaineering Guiding and Scouting in Belgium Greyhound Stud Book, national registration association for British Bred greyhounds Gençlik ve Spor Bakanlığı, the Turkish Ministry of Youth and Sports