GBL

GBL may refer to:

Sports

 * Golden Baseball League, a defunct North American league
 * Greater Boston League, a defunct high school athletic conference in Massachusetts, United States
 * Greater Brisbane League, a baseball league in Queensland, Australia
 * Greek Basket League, in Greece

Companies

 * GAMCO Investors, an American financial services company
 * GB Airways, a defunct British airline
 * Georgian Bay Line, a defunct American steamship operator
 * Groupe Bruxelles Lambert, a Belgian holding company

Other uses

 * Gainsborough Lea Road railway station, in England
 * Game Based Learning
 * Game Boy Light, a Japan-exclusive Nintendo handheld
 * Gamit language
 * gamma-Butyrolactone
 * Garden-based learning
 * Glenn A. Black Laboratory of Archaeology, at Indiana University