NK Aluminij was the only club from Slovenia that had teams playing during Gothia Cup 2012. They participated with one team in Boys 15. In addition to NK Aluminij, 233 other teams from 41 different countries played in Boys 15. They were divided into 57 different groups, whereof NK Aluminij could be found in Group 27 together with Valspar FC, IK Viljan, Hipica Campinas and Bjärreds IF 2. NK Aluminij continued to Slutspel A after reaching 1:st place in Group 27. In the playoff they made it to 1/16 Final, but lost it against PMZ Postavy with 1-2. In the Final, ACBB Paris won over Kampala Junior Team and became the winner of Slutspel A in Boys 15.