Re: Swimming pool panel GFI
680.23 Underwater Luminaires (Lighting Fixtures).
(A) General.
(3) GFCI Protection, Relamping. A ground-fault circuit interrupter shall be installed in the branch circuit supplying luminaires (fixtures) operating at more than 15 volts, so that there is no shock hazard during relamping. The installation of the ground-fault circuit interrupter shall be such that there is no shock hazard with any likely fault-condition combination that involves a person in a conductive path from any ungrounded part of the branch circuit or the luminaire (fixture) to ground.
680.27 Specialized Pool Equipment.
(B) Electrically Operated Pool Covers.
(2) Protection. The electric motor and controller shall be connected to a circuit protected by a ground-fault circuit interrupter
Compare the wording in these two sections:
For lighting: A ground-fault circuit interrupter shall be installed in the branch circuit supplying luminaries
In the other: controller shall be connected to a circuit protected by a ground-fault circuit interrupter
It seems to state clearly for your light the GFCI shall be in the branch circuit supplying the light