 After his marriage to her, his work to introduce a counter reformation in Sweden effectively ceased, and she is known to have acted in favor of persecuted anti-liturgical priests on several occasions.Gunilla accompanied John III to the council in Reval in Swedish Estonia in 1589, where the monarch came into conflict with the Councillors of the noble parliamentary estate.She acted as a mediator between the monarch and the deposed Councillors during the conflict.