When you remove the gallbladder does that cause a person to gain or lose weight or does a person's weight stay the same ?

Same. change diet!: Removing the gallbladder, in and of itself, doesn't cause weight change. But once who has had this surgery might feel better on a very low fat high fiber diet, and that can help with preventing weight gain.

Gallbladder removal: Removing the gallbladder should not affect your weight positively or negatively. Good luck with your upcoming surgery!