Almost everybody back in Sweden that I've read about on forums & FB with previous gallstone problems have had no problems or very few issues with LCHF whether they had the gallblader removed or not. Most of them have increased the fat intake slowly and also aimed for natural fatty food, the increased fat in the diet can make some gallstones start moving, all though with a diet consistent high in fat the risk for new stones will be less, more use of your bile. The best recipe for gallstones is a low fat diet, low use of the bile.