No, they aren't used for that purpose. surgery is the recommended procedure. GB issues are caused by the gb constricting to spew bile into your digestive system in order to digest fat. Controlling the amount of fat inyour diet can help with the pain but it won't get rid of the stones or repair any damage already done.
No fat. That means nothing fried, no dairy (unless fat free), no eggs, no oil, no salad dressing (unless fat free), no sauces (alfredo, cream sauces, etc), little or no red meat unless it is VERY lean, no chicken or turkey skin (just plain breast meat), no chips unless baked ones, no Mexican food, little or no Italian food, no mayo, no salmon or other fatty fish, cake frosting, most sweets if have butter in them, etc.
You can eat: lean turkey or chicken breast meat, veggies,baked or boiled potatoes, yogurt, bread, mustard, lean fish (snapper, flounder, etc), fat free sour cream, lettuce, tomatoes, etc.
But if you in fact have gallstones, this will not get rid of them. The gb would need to be surgically removed. This diet will just help to get attacks away or at a minimum.