Preheat your oven to 375°F (190°C). Line a baking sheet with parchment paper for easy cleanup.
In a large mixing bowl, combine the shredded chicken, crumbled bacon, shredded cheddar cheese, ranch dressing, and chopped green onions. Mix well until all ingredients are evenly coated. Season with garlic powder, salt, and pepper to taste.
Slice the loaf of French bread horizontally, leaving one side intact to form a 'hinge'. Carefully hollow out some of the bread from the center, creating space for the filling.
Drizzle the inside of the bread with olive oil.
Fill the hollowed-out loaf with the chicken and bacon mixture, pressing down gently to pack it in.
Place the stuffed bread on the prepared baking sheet.
Cover loosely with aluminum foil and bake in the preheated oven for 15 minutes.
Remove the foil and bake for an additional 10 minutes, or until the bread is toasted and the filling is heated through.
Allow the stuffed bread to cool for a few minutes before slicing into sections. Serve warm and enjoy!