Spray slow cooker with non-stick cooking spray.
Spread half of the cut potatoes in the bottom of the slow cooker.
On top of the potatoes, spread the diced chicken in a single-layer.
Sprinkle half of the salt, half of the pepper, half of the garlic powder on top, half of the bacon, half of the cheddar cheese, and half of the green onions on top of the chicken.
Place the rest of the potatoes on top of the chicken, and top with remaining salt, pepper, garlic powder, bacon, cheese, and green onions.
Pour heavy whipping cream evenly over the casserole.
Place the lid on top and cook on low heat for 6-8 hours.