Have been diagnosed with a single floating stone about half inch in diameter...but no pain or other symptoms.
(was noticed during a heart ultrasound scan...heart OK...but gallstone noted as anecdotal "out of service consultation")
I had gall bladder surgery. It was a piece of cake. They did put me to sleep but it was done as an out patient procedure. I went home a few hours later.
Now back around 1960, my Mother had it and almost died.
I had mine removed a few years ago. I had had a couple of attacks and then a really painful one. ER sent me home and then the surgeon admitted me as soon as I saw him. Not a bad surgery, really.