gundagai postcode nswbu Home ›› Postcode Finder ›› NSWBU ›› Gundagai Gundagai local listingsThe suburb of Gundagai is located in NSW and has a postcode of 2722. Free gundagai business listing! 1Gundagai Public SchoolWilliam St 02 694418112St Patrick's Primary School26 Homer St 02 694410853Gundagai High SchoolHanley St 02 69441233 View more business listings in gundagai Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.