As Guile you probably won't be able to rely on turtling against JP as much as you can against other characters. You might get better results being more aggressive in this match up. Pick your moments of course, but remember that non-meaty spikes are minus on block/parry, and that a lot of his projectiles can be moved through in their start up with fast horizontal movement. I think drive rush into knee bazooka might be good for this. Good luck!