“What foods to avoid after gallstone surgery?”

I too had gallbladder surgery, You will most likely be given a handout regarding diet, ask for one as well. You will mainly need to avoid fatty food, you can google for fat-free diet.
You may also find combinations of food that can make you feel unwell or can cause diarrhea or heartburn. Fatty food includes butter, high-fat milk and cream, and deep fried and fried foods. For fatty meats and processed foods, the best thing is to read the labels on packaged food and drink. You will be able to tell what foods bother you. I found that even eating salads bothered me but everyone is different, Ask questions, even ask to see a Dietitian, You will probably have to avoid alcohol for a while too. Good luck hopes this helps.