  Gamma-ray bursts (GRBs) are the most luminous electromagnetic burst in the
Universe. They occur when a rapidly rotating massive star collapses or a binary
neutron star merges. These events leave a newborn central compact object,
either a black hole or neutron star, which launches relativistic jets that emit
the luminous gamma-ray signals. These jets can accelerate non-thermal protons,
which are expected to produce high-energy neutrinos via photohadronic
interactions. This Chapter briefly summarizes the current physical picture of
GRBs, and discusses neutrino emissions from GRBs, including both prompt and
afterglow phases. Neutrinos from sub-classes of GRBs, including low-luminosity
GRBs and short GRBs, are also discussed.
