You could take the resort monorail over, it goes from Poly to GF to MK to CR to TTC. So from Poly, GF would be your next stop. This would take a minute or two at most, travel time. Or you could easily walk over, we always make the walk in 10 minutes or less. The boat from Poly also makes a triangle, it'll go to MK, then to GF, then back to Poly. That would take the longest to do, given how long it takes to dock and let off/let on boat passengers each stop. I'd say it would be at least 30-40 minutes that way. It really just depends on what sort of transportation you're looking for and how long you mind the trip taking.