You don't want to rack on top of gelatin. You should get the beer cold for 24 or more hours, then add the gelatin on top of the beer. The gelatin attracts haze particles and, together, they sink to the bottom of the vessel, yielding a clear to brilliant beer. Gelatin takes about 3 to 5 days.
Cold crashing will also clear the beer, but over a longer time and may not clear chill haze.
You can start the clearing process after you are sure fermentation is complete and the yeast has had a few extra days to tidy things up.
After the gelatin has had time to clear, you can then, gently, rack to a bottling bucket or keg. Take care to not stir up the sediment that the gelatin settled out.