Although diet doesn't directly cause gallbladder problems -- and it won't cure them -- watching what you eat and keeping a healthy weight might help you prevent gallstones from forming and avoid some. Some the risk factors are past family history and gender (women are twice as likely to form gallstones than men). Hope this helps, jd1963!
You may want to check out this site which has decent information on diets for specific conditions: http://gicare.com/diets/low-fat-diet/