I had a few gal bladder pain episodes, but after controlling my diet (less fatty food) they have not happened. Can I avoid surgery?

Possibly. Stones in gall bladder are dissolvable by natural methods, but challenging. Consider Bill Sardi's book -Dissolving Gallstones. It is scientific and credible. Apple cider vinegar has proponents. Be sure to avoid fats in your diet. And be sure you have no infection. .
Yes. You are on the right path.Avoid foods known to cause gb pain.