Goi is generally credited with centralising the Baekje kingdom, concentrating royal power and laying the foundation of the state structure.
Immediately upon taking the throne, he established a central military office to restrain the independence of regional clans. The Samguk Sagi also records that in 260, he established a central bureaucracy of six ministers, sixteen rank levels, and a code of dress, although the full system may have been completed after his reign (see, e.g., Best (2002)).
In 262, he is said to have established regulations against bribery, requiring corrupt officials to repay three times the amount of the bribe. He also ordered the cultivation of farmlands south of the capital.