  The gauge symmetry of the Ginzburg-Landau theory for two-gap superconductors
is analyzed in this letter. We argue that the existence of two different
phases, associated with the two independent scalar Higgs fields, explicitly
breaks the gauge symmetry of the Ginzburg-Landau hamiltonian, unless a new
additional vector field is included. Furthermore, the interference term, or
Josephson coupling, holding a direct dependence with the phase difference, also
explicitly breaks down the gauge symmetry. We show that a solution for the
problem is achieved by adding an additional kinetic coupling term between the
two vector fields, which generates the desired terms through a spontaneous
symmetry breaking mechanism. Finally, the electrodynamics of the system is also
presented in terms of the supercurrents inside the superconducting region.
