ATLANTA — Brian Gregory, under a mandate to show progress in his fifth season as Georgia Tech’s coach, is relying on veteran transfers to make the Yellow Jackets relevant again in the ACC. Gregory has only one winning record and no postseason appearances in his first four seasons. Last year’s team finished 12-17 overall and an ugly 3-14 in the Atlantic Coast Conference, one spot from last place. After the season, athletic director Mike Bobinski said he still believes Gregory is capable of turning the program around.