  We explore the possibility of unification of gauge couplings near the Planck
scale in models of extended technicolor. We observe that models of the form G X
SU(3)_c X SU(2)_L X U(1)_Y cannot be realized, due to the presence of massless
neutral Goldstone bosons (axions) and light charged pseudo-Goldstone bosons;
thus, unification of the known forces near the Planck scale cannot be achieved.
The next simplest possibility, G X SU(4)_{PS} X SU(2)_L X U(1)_{T_{3R}}, cannot
lead to unification of the Pati-Salam and weak gauge groups near the Planck
scale. However, superstring theory provides relations between couplings at the
Planck scale without the need for an underlying grand-unified gauge group,
which allows unification of the SU(4)$_{PS}$ and SU(2)$_L$ couplings.
