Home Postcode finder QLD Gundiah Gundiah postcode QLD Gundiah is a locality in Queensland covered by postcode 4650. Postcode 4650 State or territory Queensland (QLD) Region Sunshine Coast Add a free Gundiah business listing Be the first listing in Gundiah Common questionsWhat is the postcode for Gundiah?Gundiah, QLD has the postcode 4650.What state is Gundiah in?Gundiah is in Queensland (QLD).Does postcode 4650 cover more than one suburb?Yes. Postcode 4650 covers 48 localities, so the postcode alone does not identify Gundiah. Browse other postcodes in Queensland, or widen the search to every Australian postcode.