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
Other
- 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
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