You're going to need a little Bondo to fill the hole it looks over 1/32 deep. You can't use just the filler in a tub it won't work. Just tape the area the best you can so when you sand>lightly< you don't scuff more of your paint. Then you can use the GM touch up paint really sparingly. It will take about 3or 4 lite coats. Just enough to cover and match the color don't get to much on. Good luck.
