I don't think it'll be this high in the end, but high single digits at least are not that surprising anymore. This would be the 3rd blowout (relative to Florida) poll in the past month, with others showing him up mid-single digits. I get that Florida is a somewhat close state, but all but 3 of the gubernatorial elections since the 80s have been modest-to-large wins. Rick Scott is the only recent candidate to keep it close, and Chiles barely won in 1994, but I think that can easily be attributed to the fact that it was a GOP wave year in a state that was completing its transition away from old southern Democrats.
Probably Gillum+4 - Gillum+6 in the end.
What would Gillum+5 look like on a map?
Obama 2008 minus Flagler, plus Duval, Madison and Seminole, maybe also plus Sarasota.