Got this from the HDF forum from the person that started testing the new 2014 GPS and it capabilities. He just answered the question of weather or not you can link the Garmin to the 2014 via Bluetooth.
"Well, it's even worse than I first thought.
My salesman called me this morning to say they had a couple of new colors arrive, so I zipped up this afternoon and used the opportunity to play some more with the 6.5 and the gps. Even took my zumo 665 with me to see if Bluetooth might be the answer, as well as a memory stick with 2 custom POI files and 1 route (the same 160 mile route that failed earlier).
I keep several POI files on my zumo (National Parks, Diners/Dives & Drive-ins, Colorado Mountain Passes) and wanted to know how the 6.5 would handle multiple categories like these. Short answer, it doesn't. I have 3,000 POI's loaded in my zumo, the 6.5 reported "memory full" at only 200.
I then tried to upload the single 160 mile route to test that a little further. Lo and behold, the 6.5 reported "memory full" immediately. Apparently, the HD unit uses the same memory for any and all uploads and it won't hold much - the 200 POIs filled it and wouldn't accept anything else. It also will not access a USB stick for working memory, only to upload files, so you can't augment internal storage at all.
For comparison, I routinely have 3,000 POIs and 20 500+ mile routes loaded on my zumo at any one time. The HD unit choked on 200 POIs and a single 160 mile route.
OK, time to try pairing via Bluetooth and see if there is a work-around to use a handlebar mounted unit. The zumo and the 6.5 paired on the first bike but a customer wanted to demo the bike before we could see if it would successfully stream gps directions or mp3's. Moved to 2nd bike to continue playing, but we stopped trying after 10 failed pairing attempts. So it doesn't look like HD's Bluetooth implementation is stable enough to rely on."
Link:
http://www.hdforums.com/forum/touring-models/902009-2014-infotainment-gps-pathetic.htmljim@hdbomm.com