Mix teriyaki sauce, Worcestershire sauce, garlic salt, ginger, brown sugar, 1/2 cup white grape juice and bourbon.
Stir until thoroughly blended.
Pour 1/3 sauce on chicken pieces and mix.
Refrigerate for 3 hours or overnight.
Refrigerate leftover sauce.
Braise chicken with marinade on medium-low heat until cooked.
Remove from frying pan.
In a 2-quart sauce pan heat remainder of bourbon sauce and add 1/2 cup of white grape juice and 1 tablespoon of sugar with 1/4 cup water.
Bring to a simmer and stir until sugar is dissolved.
Add chicken to sauce and stir until chicken is coated and ready to serve.