The 23 year old defeated Sandip Pala of Fiji to take out the title in the men individual kumite -60kg event.
Bana was too strong for the Fijian, going for the upper kick during the three minutes battle to take him down 8-0.
Stephen Manaruru of Vanuatu and Emmanuel Faure of New Caledonia each got bronze.
Bana was humbled by the win and said a lot of sacrifices had paid off. He had to leave school studying science at the University of PNG this year to undergoing training for this event.
