Depends what time you're going. If early enough, it's close enough to the city for pretty much all options to be available to you. Within walking distance are lots of restaurants and pubs from GC all the way to central station. From there, if nothing suits your fancy, hop on the tram, you can go to Chinatown, all the way up to Circular Quay.
If late night punt, only things open would probably be Subway and Domino's near central station.