In addition to GAIS, 134 other teams from 27 different countries played in Boys 18. They were divided into 33 different groups, whereof GAIS could be found in Group 19 together with TSV Brokstedt, SoCal United and University of Pretoria FC. GAIS continued to Play off A after reaching 1:st place in Group 19. In the playoff they made it to Semi final, but lost it against Kharis Sports Academy with 0-3. In the Final, Kharis Sports Academy won over Greengen FC and became the winner of Play off A in Boys 18. GAIS also participated in Boys 18 during Gothia Cup 2018. They reached the 1/32 Final in B18 Play off A, but lost it against Merignac, S.A with 4-5.