  We apply the recent proposal for mirrors of nonabelian (2,2) supersymmetric
two-dimensional gauge theories to make predictions for two-dimensional
supersymmetric gauge theories with exceptional gauge groups G2, F4, E6, E7, and
E8. We compute the mirror Landau-Ginzburg models and predict excluded Coulomb
loci and Coulomb branch relations (quantum cohomology). We also discuss the
relationship between weight lattice normalizations and theta angle
periodicities in the proposal, and explore different conventions for the
mirrors. Finally, we discuss the behavior of pure gauge theories with
exceptional gauge groups under RG flow, and describe evidence that any pure
supersymmetric two-dimensional gauge theory with connected and simply-connected
semisimple gauge group flows in the IR to a free theory of as many twisted
chiral superfields as the rank of the gauge group, extending previous results
for SU, SO, and Sp gauge theories.
