Gas pains can certainly give them pain! Gas in the intestines can also occur if there's a partial blockage--and that's why the next step would be an exploratory surgery if the symptoms don't improve on their own.
Unfortunately, Evan preceded my membership on the board, so there's no thread.
With Evan, though, it was a matter of eliminating all the other things it could
be, then finally getting a diagnosis at the Veterinary Teaching Hospital at the U of MN. If there's a VTH associated with a vet college near you, that's another option you have--they tend to be a bit pricier than regular vets, but we've found that when our vets were stymied, the teaching vets could normally pinpoint the problem.
Praying that your little guy gets some relief soon!