  We discuss the basic idea of the Gauge-Yukawa Unification that is based on
the principle of the reduction of couplings. This method of unification relies
on the search of successful renormalization group invariant relations among
couplings, which do not originate from symmetry principles. The predictive
power of Grand Unified Theories can be increased by this method, predicting for
instance values of the top quark mass consistent with the recent experimental
data. The hope is that this unification attempt might shed further light on the
origin of the Yukawa sector of the standard model.
