The laws governing the legal use, storage and carrying of firearms are constantly changing. Below are the applicable laws in the State of Florida as of 2/13/2013. The below information is designed to be a guide and not the final word. If you have specific questions, please refer to  the State of Florida legislation at leg.state.fl.us. Another great resource is the Florida Department of Agricultural and Consumer Services, they can be found at licgweb.doacs.state.fl.us

790.25 POSSESSION IN PRIVATE CONVEYANCE
Notwithstanding subsection (2), it is lawful and is not a violation of s. 790.01 for a person 18 years of age or older to possess a concealed firearm or other weapon for self-defense or other lawful purpose within the interior of a private conveyance, without a license, if the firearm or other weapon is securely encased or is otherwise not readily accessible for immediate use. Nothing herein contained prohibits the carrying of a legal firearm other than a handgun anywhere in a private conveyance when such firearm is being carried for a lawful use. Nothing herein contained shall be construed to authorize the carrying of a concealed firearm or other weapon on the person. This subsection shall be liberally construed in favor of the lawful use, ownership, and possession of firearms and other weapons, including lawful self-defense as provided in s. 776.012.

Note: By Definition according to 790.001-"Securely encased" means in a glove compartment, whether or not locked; snapped in a holster; in a gun case, whether or not locked; in a zippered gun case; or in a closed box or container which requires a lid or cover to be opened for access