  Minimal supersymmetric SU(5) with exact unification is naively inconsistent
with proton decay constraints. However, it can be made viable by a
gravity-induced non-renormalizable operator connecting the adjoint Higgs boson
and adjoint vector boson representations. We compute the allowed coupling space
for this theory and find natural compatibility with proton decay constraints
even for relatively light superpartner masses. The modifications away from the
naive SU(5) theory have an impact on the gaugino mass spectrum, which we
calculate. A combination of precision Linear Collider and Large Hadron Collider
measurements of superpartner masses would enable interesting tests of the
high-scale form of minimal supersymmetric SU(5).
