If you're planning to reheat the cooked chicken after freezing it, I would suggest slow-cooking or other method that would keep it moist. Otherwise, it can be rather dry.
You can sear or brown it on the barbecue or other grill--or range top--and finish it in a slow cooker or some large pans with moisture in your oven at low temperature (start about 325, then turn down to 275).
It's actually helpful to have cooked chicken in the freezer--just be sure to portion it so you can pull out what you need the night before. I tend to do one or two serving portions, since I'm solo. Base your packaging on your family size.
I usually wrap each portion in plastic wrap, then store it in Lock & Lock containers. Any containers that are freezer safe--or the food storage bags for freezer use--are fine.
Edited to add:
Be sure to keep seasoning minimal and DO NOT use salt. The seasoning tends to intensify in favour after freezing. Salt will dry out the chicken. It's better to add seasoning when you thaw and reheat the chicken.