No there are no kids. Nightlife is only what you make it with a critical mass...if there's no one there like minded it will be a quiet trip. The good news is alcohol is available later than at Oasis Sens.
We've been to GP 3x and vow never to go back due to the boring night light. Last year at this time we were there, splitting a week between TTR and GP As a few our group did not want to go the full week. The GP bars actually ran out of rum and beer two of the nights there. I'm surprised people still go there.