Prepare the chicken and sprinkle with garlic herb seasoning. Then add to a large gallon storage or freezer bag and add lime juice and olive oil. Mix well in bag and let marinate in the refrigerator for 4 hours before grilling.
Prepare all toppings and heat grill to high. Grill chicken on each side until done (about 5-6 minutes per side), or until internal temperature is 165°. Remove chicken from grill and let rest 5 - 10 minutes before slicing for tacos.
Heat tortillas on grill for about 30 seconds per side, or just until warmed. Serve and enjoy!