Clean and then light your grill and set it to high heat. Spraying a little cooking spray on the grate BEFORE you light the grill never hurts.
Sprinkle some flour on your table or counter top so the dough doesn't stick and them put the mound of dough in the middle. Keep a light dusting on flour on the dough and your hands, it will make it much easier to handle.
Pound the dough as flat as you can with your hand and then start to roll with the rolling pin.
Continue to roll the dough from the middle out and get it as flat as you like your pizza crust. The dough will expand some when you cook it, so err on the flatter side to give it room to expand.
Transfer your flattened dough to a cookie sheet that you have sprinkled with flower and take it out to the grill.
Turn one of your burners down to about medium heat, but leave the others at high heat.
Over the medium heat burner, gently slide the dough onto the burner by wiggling the cookie sheet. This may seem scary, but the dough quickly forms a crust and it is very easy to handle on the grill.
Leave the lid open and observe the dough, pop any bubbles that form as it cooks to keep the air out.
Using a spatula or tongs, monitor the underside of the dough. Some charring is fine, this adds distinct grill flavor, but when it starts to get firm you know it's close to flipping time. This step usually takes only a few minutes.
When the dough is firm and has some char on the underside, carefully flip the dough back onto the flowered cookie sheet with the (now) grilled side up.
Brush the grilled side of the dough with a little olive oil.
Spoon the sauce onto the middle of the dough and then spread it with the back of the spoon out to the sides. The sauce should not be too thick, too much sauce makes your cheese and toppings slide off!
Now sprinkle your cheese over the sauce and place on your toppings.
Now it is time to transfer the pizza back onto the grill. Just like before, carefully slide your pizza off the cookie sheet and onto the grill.
Continue to cook your pizza until the cheese has melted and the underside of the pizza is nice and crispy!
Transfer it to a serving plate and allow to cool for a few minutes before you slice and serve.