  We revisit minimal non-supersymmetric models of SU(5) Grand Unification with
the type II seesaw mechanism as the origin of neutrino masses. Imposing the
requirement of gauge coupling unification and the proton lifetime bounds, we
perform a Bayesian fit and obtain robust quantitative information on the mass
scales of the beyond the Standard Model particles. We then study
lepton-flavour-violating (LFV) processes induced by the type II scalar triplet
and its SU(5) partners, showing that the interplay of upcoming searches for
different LFV observables can provide additional information on the masses of
the new particles, as well as non-trivial constraints on neutrino parameters.
