Moala Takelo defeated Fred Junior Gwali from Solomon Islands in the final of the men's Under 87kg division to win gold in only his second international event.
"He gives thanks to God. With God himself he's been able to achieve what he's achieved today and he's so thankful."
Sione Tufi, Viliami Moala and Tekiteki Ngahe also won bronze medals at the Harvest Centre in Apia.
Their coach, Master Paula Sitapa, was last the Tongan to win gold in taekwondo at the Pacific Games back in 2007 and said the next generation are showing a lot of promise.