Hello Dubar
You may find your answer in FCOM1 1.27.30 p3...
You stated correctly that when you lower the landing gear the system goes to direct law. The process is reversible
if you can retract the landing gear.
If L/G information is not avaiable (LGCIU 1+2 or SEC 1+2+3 fault), the system will return to alternate law when flaps/slats are < Conf 2.
However, there are certain failures where gravity gear extension will be needed, which won't allow you to retract it. If gear is not up, control laws are
direct. You'll have to go around in direct law.
So, I'd say "sometimes"
