Cebuano : Dakbayan sa Pagadian , Spanish / Chavacano : Ciudad de Pagadian , Subanen : Gembagel G'benwa P'hagadi-an/Bagbenwa P'hagadi-an ) is located in the province of Zamboanga del Sur, in the island of Mindanao . It is the regional government seat of Zamboanga Peninsula (Region 9) of the Republic of