The Jamaicans capped off an unbeaten campaign with a 55-21 victory over Trinidad & Tobago in the gold medal game.
St. Lucia took home the bronze medal with an 88-4 demolition of hosts Guadeloupe.
Jamaica, who scored a massive 65-18 win over St. Vincent & the Grenadines on Friday, will play Trinidad & Tobago in their final game on Sunday.
T&T hammered Guadeloupe 112-5 on Friday before losing a nail-biter 38-37 against St. Lucia on Saturday.
St. Lucia, after suffering a 44-36 defeat at the hands of Barbados on Friday, were dominant on Saturday with a 20-0 win over Guadeloupe.