When I moved into my home, there was an ancient under-cabinet fluorescent light fixture over the kitchen sink, which I promptly removed. The fixture was just mounted to the cabinet, no electrical box, as you can see in the photo. (Based on what I've seen elsewhere in the house, I assume there is armored cable on the other side of that hole.)
I'd like to install new LED under-cabinet lights using this circuit. Given proximity to the sink, do I need to install a GFCI outlet here, and plug in to that, or is there safe, code-friendly way to hard-wire the new fixture using only an under-cabinet junction box and raceway conduit?