Kalika France led the Terrapins (12-4 overall, 4-1 Atlantic Coast Conference) with 16 points; Delvona Oliver and Shay Doron each added 15.
Maryland held a 46-37 halftime advantage but had to fend off the aggressive Yellow Jackets (10-6, 1-3) in the late going.
"It's nice to be able to see us keep our composure down the wire," said Maryland coach Brenda Frese. "We got a lot of contributions from a lot of players on the offensive end. We stepped up and made our free throws and were able to finish the game.
"I thought Georgia Tech did a tremendous job and really hurt us on the defensive end; they were very aggressive off the dribble penetration. This is what the ACC is like: Every game is a war and you have to be ready to play. It was just nice to be able to finish."
Old Dominion 87, Towson 34: The host Monarchs (9-5, 4-0 Colonial Athletic Association) humbled the Tigers (8-5, 0-4), shooting 56.5 percent from the field and forcing 30 turnovers to take over sole possession of first place in the league with their third consecutive victory.
Towson, playing without leading scorer Kacy O'Brien for the second straight game, lost its fourth in a row. The Tigers were paced by 12 points from Kelli Talbot.
Wagner 75, Mount St. Mary's 72: Carrie Walker hit the tying and game-winning free throws in the final minute to lift the visiting Seahawks (6-8, 3-2 Northeast) past the Mountaineers (4-10, 3-2).
Adrienne Harris led Mount St. Mary's with 18 points. Myriam Baccouche and Samira Rashid each scored 16 points. Beth Foster chipped in 10 points before leaving the game in the first half because of an injury.
Trailing 44-37 at intermission, the Mountaineers put together a 9-0 run to start the second half and didn't trail again until Walker's late free throws.
Boston 72, UMBC 53: The host Terriers (6-6, 1-2) kept the Retrievers (0-12, 0-3) winless.
Anastasia Goncharova's 16 points led UMBC.
Hood 76, Keystone 70: David Wilson returned in fine fashion from a four-game absence because of an ankle sprain, scoring 15 points to help the Blazers (5-7) win at home.
Santo Provenzano scored a game-high 22 points for Hood, which made nine of 17 three-point attempts to hold off the Giants (4-12).
Messiah 80, Villa Julie 66: The Mustangs fell to 6-10 after losing to the host Falcons (10-4) in Grantham, Pa.