Gypsum AvCity of Armadale » HarrisdaleDo you (or did you) live on Gypsum Av in Harrisdale, WA? How has Gypsum Av changed over the years? What was Gypsum Av like in the early days? Who were the original residents of Gypsum Av? Ask a question or tell your story below... April 17, 2017 by PerthMETRO.net zoom out · satellite view · hybrid (zoom out) Rate this street If you would like to be a custodian/moderator of Gypsum Av, please contact us.