  If a grand-unified extension of the asymptotically safe Reuter fixed-point
for quantum gravity exists, it determines free parameters of the grand-unified
scalar potential. All quartic couplings take their fixed-point values in the
trans-Planckian regime. They are irrelevant parameters that are, in principle,
computable for a given particle content of the grand unified model. In turn,
the direction of spontaneous breaking of the grand-unified gauge symmetry
becomes predictable. For the flow of the couplings below the Planck mass, gauge
and Yukawa interactions compete for the determination of the minimum of the
effective potential.
