Yeah, there are some entertaining roads in FL if you look hard enough. If you're up for a little field trip, look up "Green Pond, FL", there are some neat roads out there. The closest thing to a "Deal's Gap" road I've seen in FL is the road out to "Ozello, FL".
Ya gotta drive a bit to get to these places... but getting there is half the fun, and though none of it compares to a good mountain road... you don't have to drive 12 hours to get there, either.
PS: There's a neat little restaurant near the end of Ozello Rd, a public park with a picnic area, too. Not much of anything out in the Green Pond area, but it's a nice diversion along the way to the Clermont area.