Preheat oven to 180 degrees C. Place a sheet of aluminium foil onto a baking tray and grease lightly.
Place fillets onto the foil and sprinkle with garlic powder, salt and pepper. Spoon picante sauce over fillets and squeeze lime juice over the top. Bring the sides of the foil together and fold the seam to seal in the fish.
Bake in preheated oven for 15 to 20 minutes or until fish flakes easily with a fork.