Where are you planning on putting the GPS/Mp3 player? If you're going somewhere on the dash then I have two suggestions:
-Drill a small hole in the forward wall of the center console below the ACI, and 12v plugs (near the bottom) just big enough to fit your wire through. If you ended up selling the car then I doubt anyone would see that hole hidden down there.
-Run the wire under the shifter/cupholders, have it come up through the back section of the e-brake hole and then go over the edge of the center console compt. and to the ACI. There's a little channel along that edge for a wire to run without being pinched.
-Drill a small hole in the forward wall of the center console below the ACI, and 12v plugs (near the bottom) just big enough to fit your wire through. If you ended up selling the car then I doubt anyone would see that hole hidden down there.
-Run the wire under the shifter/cupholders, have it come up through the back section of the e-brake hole and then go over the edge of the center console compt. and to the ACI. There's a little channel along that edge for a wire to run without being pinched.