How do I get assistance to get to my gate (bags, wheel chair) from the car return at Atlanta Enterprise

I don't know but i`m sure if you check with Enterprise Customer service when you rent your car they will sort it for you since you'll need help to get yourself to the pickup area too.

Surely there is always a person who will help us at the airports and take them to your airline.

Sky train

Leave the return area an take the escalator or elevator up to the tram on 3rd floor. It will take you into the baggage claim area and from there locate your airline to check baggage and find concourse where plane departs from. You’ll be on north terminal or south. I fly Southwest alot so it's on the south terminal. I guess one can ask for assistance from the airport personal for wheel chair assistance. Hopefully this helps.