Can I put them on the same circuit or do I need separate circuits?
Yes, interior and exterior lights can be on the same circuit. The same circuit breaker that works for my family room also works for my porch.
And yes, GFCI and non-GFCI can also be on the same circuit. Typically they recommend that the GFCI outlet is the first receptacle connected to a circuit so if it trips, it cuts off power to the rest of the circuit since current will not travel through the neutral to the other leads.