Preheat your grill to medium-high heat.
In a bowl, combine olive oil, garlic powder, paprika, salt, and pepper.
Brush the chicken breasts with the marinade mixture.
Place the chicken on the grill and cook for 6-7 minutes per side.
Ensure the internal temperature reaches 165°F (75°C).
Remove the chicken from the grill and let it rest for a few minutes.
Toast the hamburger buns on the grill for 1-2 minutes.
Spread mayonnaise or sauce on the bottom half of each bun.
Layer the grilled chicken on the buns, followed by lettuce and tomato slices.
Top with the other half of the bun and serve immediately.