Fighting in the 60kg bantamweight division, Katua cruised through to the final beating his Samoan opponent.
This set up the gold medal playoff with Northern Ireland’s Bradley Tieman which Katua won easily.
More good news for PNG came when the duo of Mathew Stubbings and Violet Apisah also won a bronze medal in the Mixed Doubles division.
PNG Olympic Committee Secretary General, Auvita Rapilla congratulated Katua and the tennis duo for their achievements.
“This young boxer is special, the future looks promising for him,” said Rapilla.