I wonder why their was never a episode where we get to see paul get his drivers license every episode we see kevin driving him around but we never see paul driving kevin around in a car.

Probably because that would have been a recycled plot since we already had the episode about Kevin getting his. Then again, there was the episode where Ricky Holsenbach got his at the beginning of 10th grade, but the struggle of getting it was a small part of the plot.

I just assume Paul got his license off camera.

I dont think paul ever got his license until maybe his senior year of high school or maybe when he graduated high school, their was no way in season 5 and 6 paul would want to drive in a car with kevin and his dorky friends if he had his license, i think paul only hanged out with kevin in seasons 5 and 6 was because kevin was giving him free transportation to work everyday for free, i guess paul did not want to take the bus lol