Set up the grill for two-zone cooking. One side should be directly over the heat source to allow the meat to develop a nice sear. The other side should be protected from the direct heat to allow for finishing in a convection set up.
Bring the temperature of the grill up to about 400° and place the steak over the direct heat side. It will take about seven minutes for it to sear.
Turn the steak over and let the other side sear.
Season both sides with salt and pepper and move the steak to the indirect heating side of the grill.
Check the temperature regularly. The outside will sear quickly, but the inside might still be frozen and raw. Use a wireless meat thermometer to check. Thinner steaks will cook much faster.