AF Castelo Branco was one of 7 clubs from Portugal that had teams playing during Gothia Cup 2017. They participated with one team in Boys 15. In addition to AF Castelo Branco, 203 other teams from 30 different countries played in Boys 15. They were divided into 50 different groups, whereof AF Castelo Branco could be found in Group 5 together with Forza Academy, Samaya FA and Stenkullen GoIK. AF Castelo Branco continued to Play off A after reaching 2:nd place in Group 5. In the playoff they made it to 1/16 Final, but lost it against Kungshamns IF with 0-3. In the Final, AC Ajaccio won over CO Vincennes and became the winner of Play off A in Boys 15. AF Castelo Branco comes from Castelo Branco which lies approximately 2400 km from Göteborg, where Gothia Cup takes place.