[4][5] However his main passion was soccer, he was considered quite a talented player and desired to continue toward playing it professionally.
[10] Gulden also played for the UNSW-Eastern Suburbs Bulldogs in three seasons from 2018 to 2020 for a total of 33 games[11] and was named as best on ground in their 2019 premiership win over Sydney University.
[14][15] Gulden debuted in the opening round of the 2021 AFL season, starring for Sydney in their shock win over Brisbane Lions.
[25] Gulden played the first eight games of the 2021 season, before being sidelined for an extended period of time due to stress reactions in his foot.
Gulden became a key part of Sydney's best 22, helping the team qualify for finals after a 16th-placed finish the year before.
He played 15 games and kicked 12 goals, and was recognised by his peers when he won the AFLPA Best First Year Player award.