Gunsan, South Korea celebrates 40 years as Tacoma’s Sister City April 24, 2019 Gunsan, Home, News Mayor Woodards recently returned from a visit to Tacoma’s Sister City, Gunsan, South Korea. The mayor traveled with a delegation to Gunsan in honor of the 40th anniversary of Tacoma-Gunsan. Share Reserve your tickets for the Sister Cities Film Festival !Tacoma Sister Cities to Launch International Book Club !