if it is turbo and is a pontiac then the motor is out of a grand prix tgp.. with no mods it is 205 but they are easily upgraded and can be quick.. other note the grand am is lighter than grand prix. stock quarter mile for the grand prix was high 14's low 15's. with any upgrades your looking 13-14 range maybe quicker... on one forum i used to be on the was a couple of guys low in the 13 and high 12's... boost is good....
i am a former grand prix owner... i know i know.. sorry gosh..
so i would just say watch it and be carful and good luck