You can exit at either the North Avenue or Midtown stations to get to Georgia Tech.
At North Avenue you’ll want to exit at the North Avenue station, following the signs to North Avenue/West Peachtree Street and avoiding the exits pointing to the Fox Theatre. Walk about five minutes west on North Avenue, crossing over the connector and you’ll reach Bobby Dodd Stadium and further down the Cherry Street entrance to the campus as well as the Student Center (which is a longer hike).
A bit easier option is to exit at Midtown and take one of the Tech Trolleys to campus. The shuttle picks up at the Peachtree Place station exit and goes down 5th Street and ends near the Ferst Center and the gym. Bus routes 12 and 37 also depart from the Midtown station and travel down 10th Street at the northern edge of the Tech campus.
See the campus map to help you plan your trip.