I lived in Gahanna a couple of years. It was a GREAT place to live. Five minutes to the airport, close to the mega shopping area of Easton, but has the quiet night life of Gahanna. I lived in the apartment complex Vista at Rocky Fork. It was a little higher than some, but very secure, spacious bedrooms, responsible management. A couple of years ago it was $700 for a one bedroom. I made it work on a first year regional FO budget. The link is:
CASTO - Communities

Good luck in Columbus -- You will enjoy your time there.