Did mine, '01 SE but no different from your GXE, whithout much trouble. I used a 12" extension with a swivel joint to get at it. Also had to use a breaker bar (piece of pipe over the rachet handle) to get some additional leverage. Awkward to finally remove the bolt but doable. There's a very good write up with pictures in the DIY sticky...follow them, they work!
^^^Ya I did it similar. That rear bolt is quite long, has a lot of threads to it, ha. If I remember correctly I used a pair of 3" extensions and a deep socket along with a 6-8" pipe over the ratchet for torque.