I'm adding a new bathroom in the basement, and the spot where it is is
quite a far run from the service panel.

There are no existing circuits in that section of the basement that I
would want to add the light, exhaust fan, and GFCI to.

Is it within NEC guidelines to run a separate 20 amp circuit to the
bathroom, and run the light above the sink, the exhaust fa, and a GFCI
receptaple on the same circuit?

Thanks