I'm a GWV from 90-91 and I also had acid reflux but I don't attribute it to the gulf war.
A lot of the problems some of us have - would've happened anyway. My sister has acid reflux as well and it's mainly due to stress and poor eating habits which I had both. Now granted - stress could've come from the PGW - but we all have stress regardless.
It sounds like it's possible that he went too long without getting diagnosed on the acid reflux because that's exactly what can happen when you let it go - it destroys your esophogus.
I'm sure the doctors will do everything they can for him and I'm sure with today's technology he'll be fine.
Prayer always works for me as well.
PS: My medical records are missing as well too - anyone that had a medical problem in the PGW - of course your records are missing. LOL