Home Postcode finder QLD Brisbane Gpo Brisbane Gpo postcode QLD Brisbane Gpo is a locality in Queensland covered by postcode 4000. Postcode 4000 State or territory Queensland (QLD) Region Brisbane Central Add a free Brisbane Gpo business listing Be the first listing in Brisbane Gpo Common questionsWhat is the postcode for Brisbane Gpo?Brisbane Gpo, QLD has the postcode 4000.What state is Brisbane Gpo in?Brisbane Gpo is in Queensland (QLD).Does postcode 4000 cover more than one suburb?Yes. Postcode 4000 covers 6 localities, so the postcode alone does not identify Brisbane Gpo. Browse other postcodes in Queensland, or widen the search to every Australian postcode.