Western Sydney youth team were up 2-1 in the match, thanks to two classic goals from number 10, Jerry Skotadis.
After the break, Amicale were the better team, scoring three more goals from Octav Meltecoin, Jackson Tasso, Solo Iaruel and Vanuatu super star Bong Kalo.
This is Amicale second time to win the Grand Casino Cup.
Two years ago the Reds beat Marconi and last year 2016, Australia club, Apia Tigers won the cup but this year the cup remains back in Port Vila, Vanuatu.
Grand Casino management has confirmed to sponsor the next tournament in 2018.
