Preheat your oven to 375°F (190°C).
In a mixing bowl, combine the shredded chicken, cream cheese, cheddar cheese, green onions, garlic powder, salt, and black pepper.
Unroll the crescent roll dough onto a lightly greased baking sheet.
Separate the crescent roll dough into individual triangles and spoon about two tablespoons of the chicken mixture onto the larger end of each triangle.
Roll up each crescent, starting from the large end and rolling towards the point, then seal the edges.
Arrange the rolled crescents on the baking sheet spaced apart.
Bake in the preheated oven for 12-15 minutes or until golden brown.
Remove from the oven, let cool slightly, and serve warm.