Can you tell me the main clinical features of gilbert syndrome?

There are none: Gilbert's (zheel-bear's) is a mild metabolic kink that produces slightly elevated indirect bilirubin, especially if you miss a few meals. The jaundice might be noticeable to someone with a good eye. The worst part of the "disease" is getting diagnosed and believing you are actually sick. It's extremely common, with a few % of your friends being affected.