Fitzgibbons did it the hard way at Lo Bocana and El Sunzal surf breaks, securing gold by emerging unscathed from a total of 11 heats after having been relegated to the repecharge rounds last week.
But having navigated her way through to the final, the current world No 2 was able to claim gold with a 14.
Peruvian Daniella Rosas came in fourth.
Wilson made it through to the fourth..
For good measure, victory in El Salvador saw her make history as the first athlete to win gold three times at the World Games, following successes in 2008 and 2018.
It meant she had to win through a series of seven sudden death match-ups.
Description: Just competing and seeing all the Olympians get their spots is great.