A. Master electrician Sean Kenney responds: The short answer is yes. Although the NEC does not require either the switch or the light fixture to be GFCI-protected, most lighting fixtures designed for use in a shower stall require GFCI protection to meet UL requirements. Providing GFCI protection for a switch within reach of a shower stall is a good safety practice, even when not required by code.
It’s worth consulting your local inspector before you locate a switch within reach of a shower stall. Even though the NEC allows such an installation, two inspectors have made me move switches so they were out of reach of the shower stall.
to read the full article.