Could anyone tell which hospitals/doctors in pune are good for gastroenterology/hepatology?

Dont know pune. I don't know where pune is but by going to the websites of the aga you can search for an aga member near your.
Many. There are many great institutions for gi. I would look at the closest tertiary care center (ie academic center).
Try ruby hall/ CA/ There are quite a few good places in pune. On my last visit to india i had the pleasure to explore ruby hall and columbia asia. These are two good hospitals. Also dr amol bapaye at deenanath mangeskar hospital is also good. Hope this helps.
GI in India. That information is best obtained from the local medical society which rates doctors & hospitals.