When is the race?
I'm only going to cover hardware that may help. Nothing of racing technique, reaction times, staging and launching.
Get rid of any excess weight. Remove the spare tire and tire changing equipment and anything else not needed in the trunk. Another suggestion is to remove the rear passenger seat both lower and upper cushions. Run the fuel in the gas tank down below 1/4 tank or less. Gasoline weighs about 7 lbs per gallon.
Remove the driver's side headlight assembly so you get better airflow into the high pressure area for the intake system and CAI/FWI, if installed.
Remove the ABS fuse so traction control does not engage. Some people just turn off traction control but that does not preclude it from engaging when it decides to since the GTP has a full range traction control system. You should get better times with traction control off or inhibited. The conventional braking system will work fine with the ABS fuse pulled.
Drop front tire pressure down to 20-22 lbs.