Preheat oven to 350F and grease a 9x13 inch baking dish.
In a large bowl, whisk together the gluten free chocolate cake mix, eggs, vegetable oil, and water until smooth.
Pour the batter into the baking dish and bake for 30-35 minutes until a toothpick comes out clean.
While the cake is still warm, use the round handle of a wooden spoon to poke holes all over the surface of the cake, about 1 inch apart.
Warm the caramel sauce slightly in the microwave, then pour it evenly over the cake, making sure it seeps down into all the holes. Let the cake cool completely.
Whip the heavy cream and powdered sugar together until stiff peaks form, and spread it in a thick layer over the cooled cake.
Sprinkle the mini chocolate chips evenly over the whipped cream layer before serving.