Can a low functioning gallbladder only cause noises, and no other symptoms?

No: Noises (i am presuming gas noises) in the abdomen with "no other symptoms" is not a gallbladder condition. Gallstones cause abdominal pressure pain ; nausea after eating. Review your test results and your symptoms with your doctor.

??: Not sure that a gallbladder would cause noise. But if there are no symptoms your really don't need to worry about it

No,: gallbladder disease does not manifest as bowel sounds/gas(I presume that's what you mean) as a solitary symptom.