it actually can have pockets, but cost will just shoot up.
Gore-tex jackets cannot be sewn, every joints must be patched with
another Gore-tex membrane with glue. If the join is sewn, then it
must be patched.
As for Gore-tex material, all Gore-tex jacket use the same
materials as any other rain jacket (Nylon), the only difference is
the membrane layer.
The shell is Nylon. The Gore-tex is Polytetrafluroethylene (PTFE)
membrane.