Home Postcode finder VIC Gatum Gatum postcode VIC Gatum is a locality in Victoria covered by postcode 3407. Postcode 3407 State or territory Victoria (VIC) Region Vic Far Country Add a free Gatum business listing Be the first listing in Gatum Common questionsWhat is the postcode for Gatum?Gatum, VIC has the postcode 3407.What state is Gatum in?Gatum is in Victoria (VIC).Does postcode 3407 cover more than one suburb?Yes. Postcode 3407 covers 5 localities, so the postcode alone does not identify Gatum. Browse other postcodes in Victoria, or widen the search to every Australian postcode.