In 2011, Gomaa signed for El Mansoura in a 3-year contract for a fee of E£ 400,000. He scored his first goal in his official debut on 17 November 2011 against Baladeyet El Mahalla in a 1–2 loss in the 2011–12 Egyptian Second Division. He scored 4 goals in 7 matches in his first season, however all of the football competitions in Egypt were suspended by the Egyptian Football Association after the Port Said Stadium riot occurred. Gomma finished his second season as the club's top goalscorer, scoring 16 goals in 25 matches. He also finished as the club's top goalscorer in the next season despite scoring only 6 goals in 19 matches in a disappointing season for his side as they failed to qualify to the promotion play-offs. His last goal for El Mansoura was on 12 May 2014 against Ittihad Nabarouh in a 1–1 draw in the league.