Your reaction time leaves a lot to be desired. This is not a put down, but a learning experience. It takes lots of practice to get it right. When are you leaving? You have to go when you see the last amber light go on. remember, the lights are 0.500 apart, so if you go when the last amber goes on, you should leave just when the green goes on. Just keep practicing, and you will see that 0.015 reaction time.
By the way, your 1/4 mile time for a stock 2001 GT is actually pretty good. Enjoy yourself and be safe.
89 LX Notch: Floo-Tek 5.0X heads, GT-40 intake, B-303 cam, Dynamic 3800 converter, 4.10:1 gears & lots of suspension work. 12.50 @ 106.42 MPH.