But if you stay at the Polynesian, you don't even have to change monorails...just make the short walk to the TTC.
And actually although we've never tried it, a guest service person at EPCOT looked it up for us one night a year ago in Dec. and her info said that there was a bus to the GF from EPCOT....Polynesian as well and CR I think. We were staying at the GF at the time and considered a bus but ended up doing the monorail. I suppose her info could have been outdated but you wouldn't think so.