Verify that the gas valve is on before attempting to light the pilot light. Look for a valve that regulates gas flow to your fireplace. It may be located behind a small access panel at the bottom of the fireplace, or it could be a wall or floor switch.
Locate the red ignitor button, using a flashlight to see it if necessary. Identify the main control knob, marked with the words "Off/On/Pilot;" it also can be found on the gas valve.
Push the knob slightly. Turn it first to "Off" for a few seconds, then to "Pilot." Hold the knob down again to keep the gas line open.
Click the ignitor button until the pilot light is lit. Release pressure on the knob slowly. If the pilot light remains lit, turn the knob to the "On" position and step away from the pilot light.
Wait two to three minutes if the pilot light goes out, to allow time for the gas to travel to the pilot before you try again. Click the ignitor again until the pilot light is lit. Turn the gas fireplace's manual switch to the "On" position after the pilot light has been lit. The knob must be in the "On" position for the wall switch to work.