GBM may refer to:

Medicine

  • Glioblastoma multiforme, an outdated term for glioblastoma
  • Glomerular basement membrane

Science and technology

  • Gateway belief model, a model in psychology and the communication sciences
  • Geometric Brownian motion, continuous stochastic process where the logarithm of a variable follows a Brownian movement, that is a Wiener process
  • Gradient boosting, a machine learning technique
  • Generic Buffer Management, a graphics API
  • Gamma-ray Burst Monitor, aboard the Fermi Gamma-ray Space Telescope
  • Game Boy Micro, a 2005 handheld game console and the last model in the Game Boy line

Other uses

  • Grand Besançon Métropole, a French intercommunal structure
  • GBM (League of Legends player) (born 1994), Korean video gamer
  • Geoffrey Bwalya Mwamba (born 1959), Zambian politician
  • Garbaharey Airport, in Somalia
  • Garhwali language
  • Grand Bauhinia Medal, an honour of Hong Kong
  • Greater Britain Movement, a short-lived far-right group
  • Green Belt Movement, a Kenyan environmental organisation