I've seen a few post about covering the gas range for extra counter space, here's how I did mine...
I made a frame of 1 by 3 oak, to match my cabinet face frames, and cut a dado all the way around the inside to receive the insert. The insert is two pieces of white board, glued back to back. The dado is set so that the insert rests high enough off the base to clear the burners, leaving just enough of a lip around the top to keep things from rolling off.
The unit ended up being too deep to mount with hinges, and required cutting on one face so that it could stand and rest on the back wall of the kitchenette.
The unit stands by itself, and provides a heat shield for the outside wall. (I deleted the factory kitchen surround in my rebuild, was left a little concerned about heat and paint)
Since it's not screwed in place, it also serves as a serving/picnic tray...
Warning, however, that since it is not screwed in place, it can (and it did) slide/bounce off the counter underway. My solution is to turn the unit around, so the cut away that lets it hinge up is on the forward side during travel, leaving the full depth side on the back to 'trap' it from moving (lower left of picture). Hasn't happened again.
And, with a couple of white board markers, it's our message center. My better half enjoys sleeping-in at camp, I'm always up at first light
. "Gone Surfing"