Gallstones are treated with a choleycystectomy (ko-lee-sis-TEK-to-mee). This is the surgical removal of the gallbladder. That's how gallstones are removed. The gallbladder isn't an essential organ.
I have to disagree with Tony's answer. What he says is wrong. He mentions a "lap choley" (although not by name), a nick name for a laparoscopic choleycystectomy. 3-4 small incisions are made for an endoscope (a laparoscope) and the surgical instruments. The incisions are called "ports". One, approx. 10mm in length, is the optic port for the laparoscope, two are operating ports (one 5mm, the other 10mm) used for the instruments and the fourth (5mm) is the assisting port for extra instruments as needed. There's no "probe" involved. The gallbladder is separated from where it sits with electrosurgical scissors or knife and pledgets. The organ is removed from the abdominal cavity using a gallbladder extractor. A "lap choley" is considered a minor procedure, a common procedure and a same day surgery (if there are no complications) however it's not done in a doctor's office. This is done in a surgical suite (OR) with a surgeon, a circulating nurse, an anesthesiologist/nurse anesthetist and a surgical tech or scrub nurse.
The alternative is the "open choley" and it *is* used when needed. Don't let "Tony" give you the impression that all choleys are done lap. They're not.