These are diagnosis that you are telling. How are you diagnosed with it in the first place? Meaning what are you symptoms.
These things are important because homeopathy works on the principle of treating patient as a whole, not the name of the disease but how that disease is affecting the person.
GERD, IBS, ACIDITY, etc. Are all very much curable by homeopathy.
Next Steps
Get a consult done by physician who can take your complete case and do a proper analysis with medicine selection.
Health Tips
Apart from medicines, all the gastric symptoms also require change in diet and lifestyle so do follow that as well which your physician will tell.
Take care.