  In the two papers of this series, we initiate the development of a new
approach to implementing the concept of symmetry in classical field theory,
based on replacing Lie groups/algebras by Lie groupoids/algebroids, which are
the appropriate mathematical tools to describe local symmetries when gauge
transformations are combined with space-time transformations. In this second
part, we shall adapt the formalism developed in the first paper to the context
of gauge theories and deal with minimal coupling and Utiyama's theorem.
