Pat vegan snapper fillets dry with paper towels.
In a bowl, mix olive oil, garlic powder, paprika, salt, and pepper.
Coat fillets evenly; let rest 10 minutes.
Preheat grill to medium-high; lightly oil grates.
Place fillets on grill; cook 6–7 minutes per side until lightly charred.
In a saucepan, whisk orange juice, lemon juice, lime juice, olive oil, maple syrup, and parsley; simmer 2 minutes.
Remove snapper from grill, drizzle with citrus sauce, and serve hot.