If the gps has an output for like a head phone, you could. Im asuming that you have a radio. If so just tune into the radio and play through the radio speakers. If you do not have a radio and no outputs for a head phone on the gps. Then I would buy a cheap am/fm hand held at radio smack or wally world. Hook up rca cables from a amp to the head phone jack on the am/fm hand. The send through the fm transmitter to the hand held radio.