Cut the chicken breasts into 1-inch bite-sized pieces.
In a large bowl, whisk together pickle juice, olive oil, paprika, salt, garlic powder, onion powder, and black pepper.
Add the chicken pieces to the marinade and toss to coat evenly.
Cover the bowl and refrigerate for 30 minutes to 4 hours.
Preheat your grill to medium-high heat (375°F to 400°F).
Remove the chicken from the marinade and discard any remaining liquid.
Place the nuggets on the grill, leaving space between each piece.
Grill for 3-4 minutes on each side, or until the internal temperature reaches 165°F.
Remove from the grill and let rest for a few minutes before serving.