In a medium bowl, whisk together flour, baking powder, baking soda, cinnamon, nutmeg, ginger, and salt. Set aside.
In a large bowl, stir together the brown sugar, eggs, and melted butter until smooth. Add the shredded zucchini and vanilla extract and mix until well combined.
Add the dry ingredients and mix until just combined, don’t over mix. Gently fold in 1 cup of the chocolate chips.
Pour the batter into the prepared loaf pan and sprinkle turbinado sugar over the top. Top with the remaining ¼ cup of chocolate chips. Bake until golden brown and a toothpick or cake tester comes out clean, about 50 to 65 minutes.
Remove the bread from the oven and let sit in pan for 10 minutes. Loosen with a bread knife around the edges and carefully remove the bread from the pan. Cool completely on a cooling rack before slicing.