Combine ginger, honey, juice, and soy sauce in a bowl, stirring with a whisk until smooth. Heat a grill pan over medium-high heat, and coat with cooking spray. Sprinkle pork with 1/2 teaspoon salt and 1/4 teaspoon freshly ground black pepper. Add pork to grill pan; cook 15 minutes or until a thermometer registers 145° or until desired degree of doneness, basting frequently with sauce. Let stand for 5 minutes before serving.