1) I, also, had gallbladder surgery, but with some MINOR complications.
2) I was fine that same day and went home without problems.
3) Never had a pain from the surgery, and didn't even use a single Tylenol.
4) However, I was advised to take it easy for 3-4 weeks.
5) This allowed my internals to heal and return to normal.
6) As for Disney
. . . we did have relatives down 2-weeks after my surgery.
. . . I rode with them on "tame" rides (eg. Splash Mountain, Pirates of Caribbean, monorails)
. . . did not ride anything with major movement (eg. Big Thunder Mountain, Space Mountain, RnRC)
. . . had zero problems
7) The doctor said, Rule-of-Thumb
. . . if the body can get tossed around, so can your insides
. . . avoid such rides
. . . he wanted me to enjoy characters, and not become one