I'm new to all this; I was informally diagnosed after a scope and I'm still waiting for labs to come back, so take this with a grain of salt. However, my GI thinks I have Crohn's and has also diagnosed me with gastritis, and put me on an antacid (Prilosec) for it. This could be because I've possibly had Crohn's and not done anything about it for an indefinite period of time. The only other digestive concern I have is Celiac Disease, which is under control, so if the gastritis is linked to anything in my case, it would have to be the Crohn's.
In short, I think it's possible.