Preheat the grill to medium-high (about 450°F or 230°C).
In a small bowl, whisk together the olive oil, coconut or brown sugar, and 1 teaspoon each salt and pepper until smooth.
Brush both sides of the squash slices with the coconut sugar mixture. Place the squash on an oiled grate, and grill, uncovered and turning often, until tender and golden brown, 8 to 12 minutes, depending on the thickness. To prevent the sugar from burning, rotate the squash pieces, as needed, from hot to cool spots on the grill.
Transfer the squash to a platter, sprinkle with the pine nuts, basil, cheese, orange zest, and, if desired, red chile flakes. Serve with the lemon wedges.