Can liposuction and gallstones be done at same time?

I don't think there would be an absolute contraindication but this is a strange combination of procedures to do. It would have to be done with the consent of both the general and plastic surgeon.

It is possible to do liposuction of areas not involving the abdomen during an elective gallbladder removal, provided both surgeons are willing to do so.Any evidence of infection or inflammation of the gallbladder would be a reason not to proceed, and there should be no interference with the gallbladder incisions by the areas liposculpted 

As long as the liposuction areas are remote from the abdominal incisions, doing both surgeries simultaneously should not be a problem.