2003 Pontiac G5 - Key is stuck

i was putting new subs in after i checked everything and it worked great i was putting the radio back and then the radio shut off and i got a anti theft light on my dash board and now my key is stuck in the ignition but to jump the car i have to open the trunk because the battery is in the back, but i need the key witch is stuck in the ignition

Don’t you have positive and negative (ground) terminals under the hood?

You should be able to jump start it under the hood. Normally a red plastic cover will be over the positive jumping point, and the shock tower bolts can be used for the negitve connection.

Common enough problem with these cars.