In addition to Gustavsberg IF, 107 other teams from 14 different countries played in Girls 15. They were divided into 18 different groups, whereof Gustavsberg IF could be found in Group 13 together with TPI Odense, Kolbotn IL, Kiruna HK 1, Brabant Selectie 2 and Gjerpen IF. Gustavsberg IF continued to A-Play-off after reaching 2:nd place in Group 13. In the playoff they made it to 1/32 Final, but lost it against Rosersbergs IK with 11-12. In the Final, Hellerup IK 1 won over Skogås HK and became the winner of A-Play-off in Girls 15.