Yes, the A/C unit drains onto the roof then flows into one of the rain gutters depending on how slightly unlevel the RV is. My former camper had a flat roof and I never knew where the A/C water would drain off. I had to tweek the level to get the water to run off of the left rear corner. My newer unit has a crowned roof and so far it always drains oof of the left rear corner.
2015 FR Freedom Express 310BHDS pushing a 2014 GMC Sierra CC