Well you never know what FL fish and Game would do, but I personally wouldnt worry about it. Im sure FL F&G has better things to do and worry about than checking regulations in cities outside of FL.
You or your freiend really should have looked into and acquired whatever permits are needed before hand though. When people back door animals without the proper permits and so forth ... if something happens down the road the officials just make things harder for everyone including the people that do get the permits and so forth before hand.
It is posible to get permits, its just a matter of taking the time to research the regulations, do whatever you might have to do to quailify for the permit and then apply.
I mean look at California, no one wants to ship a croc to california, most importers and exporters of croc's make sure that any croc's dont go anywhere near Califonia for fear that the croc's would be seized because of there regulations there. BUT even Califonia must have exceptions and otherwise allow crocodilians (i havent researched the regs there to no exactly) San Diego Zoo has croc's that im quit sure are legal, Jackson had croc's at his home/private zoo and im sure there are tons of others by private keepers and facilities that keep croc's in California.
Bottom line is that im sure you or your friend will be ok, BUT the correct permit needs to be acquired otherwise you are running a risk of being caught fined possibly even jailed not to mention all of the problems that your unpermited gator could bring onto the folks that do keep there croc's legaly under permit.
When there is any kind of problem with croc's even if they are illegaly kept animals, all of the negativity will fall toward both legal and illegal croc's.