Occasional dull pain on right side of abdomen. more likely gerd or liver pain?

Nonspecific: Right sided abdominal pain is nonspecific. Certainly however, it is not related to GERD. The liver is in the right upper abdomen, under the rib cage, but it is impossible to know if this is the cause. Could be something as simple as gas or a muscle spasm/strain. If you're worried, see your primary care provider for a more complete evaluation. Hope this helps!