Home Postcodes by state VIC 3566 Postcode 3566 3566 is the postcode for Gunbower, VIC. Localities with postcode 3566GunbowerVIC Postcode 3566 State or territory Victoria (VIC) Localities 1 Council area Campaspe Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 3565 · Postcode 3567