I had my Gall Bladder out a few years ago.
I had generally not been feeling great for a few months and started to have GB attacks (felt like a heart attack) after eating higher fat foods. I was diagnosed pretty quickly. My mom and I see the same Dr (which as been fabulous for me) and I ended up having my GB taken out 2 weeks after she had hers out (the same surgeon too). Our surgeon was excellent and gave us very clear post-surgical instructions - he also keeps his patients in the hospital overnight after surgery. It was clear liquids for the first 24 hours, the gradually introduce soft foods.
I found that foods I couldn't eat before surgery I can now eat with no problem. However, I've also found foods I can't eat anymore. Too much cream cheese will send me straight to the bathroom with "intestinal distress" (there's a funny story about how I found that out on the way to work that involved an emergency stop at a Jack-In-The-Box to use their restroom )
Good luck with your surgery. Everyone I've known who has had their GB removed felt much better after the surgery was glad they did it.
No matter how big or soft your bed is, you still have to get out of it.
-Grace Slick, raucous rock diva