Geumgwan Gaya (43 - 532), also known as Bon-Gaya ("original Gaya") or Garakguk ("Garak State"), is 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 location, this kingdom played a dominant role in the regional affairs from the Byeonhan period onward to the end of the Gaya confederacy.