How long does it take the gas from laparoscopic surgery to go away? How long after laparoscopic surgery will I feel the gas inside me? .

Varies. The gas will go away quickly in most cases. The specific time will depend on a number of factors including how long was the surgery, what was done during the surgery, how heavy is the patient, how quickly can the patient be up and ambulating, etc. It can take anywhere from a few hours to a few days.
Varies. Generally all of the carbon dioxide gas used at laparoscopy is removed at the end of surgery. There can be small amounts of gas under the diaphragm that could cause right shoulder discomfort. Most any small residual gas is gone in 24 hours or less. An abdominal bloating feeling after surgery can last a few days.