I would keep a piece of plywood handy for my gas grill.
Since I converted back to charcoal, I do my grilling on the driveway. Don't have to worry about the drips.

Go to Home Depot in the BBQ area. They sell exactly what you are looking for. They are fiberglass mats that go under the grill or under an outdoor fireplace. They may not have them this time of the year.

Things rarely fall out of a barbecue.
High wind knocks the grill over, the hot coals spill on the deck, and since everyone is usually asleep, the fire gets a nice start before being detected.