  Gamma-Ray Bursts are the most energetic explosions in the Universe, and are
among the most promising for detecting multiple non-electromagnetic signals,
including cosmic rays, high energy neutrinos and gravitational waves. The
multi-GeV to TeV gamma-ray range of GRB could have significant contributions
from hadronic interactions, mixed with more conventional leptonic
contributions. This energy range is important for probing the source physics,
including overall energetics, the shock parameters and the Lorentz factor. We
discuss some of the latest observational and theoretical developments in the
field.
