Geumgwan Gaya (43 - ), also known as Bon-Gaya (본가야, 本伽倻, " original Gaya ") or Garakguk (가락국, " Garak State "), was the ruling city - state of the Gaya confederacy during the Three Kingdoms Period in Korea. It is believed to have been located around the modern - day city of Gimhae, Southern Gyeongsang province, near the mouth of the Nakdong River. Due to its geographic.