Anyone know if it is legal to have a gun in your parked car on public school grounds in FL?
Yes.
790.115 Possessing or discharging weapons or firearms on school property prohibited; penalties; exceptions.-
(1) A person who exhibits any sword, sword cane, firearm, electric weapon or device, destructive device, or other weapon, in the presence of one or more persons in a rude, careless, angry, or threatening manner and not in lawful self-defense, on the grounds or facilities of any school, school bus, or school bus stop, or within 1,000 feet of the real property that comprises a public or private elementary school, middle school, or secondary school, during school hours or during the time of a sanctioned school activity, commits a felony of the third degree, punishable as provided in s. 775.082, s. 775.083, or s. 775.084. This subsection does not apply to the exhibition of a firearm or weapon on private real property within 1,000 feet of a school by the owner of such property or by a person whose presence on such property has been authorized, licensed, or invited by the owner.
(2)(a) A person shall not possess any firearm, electric weapon or device, destructive device, or other weapon on the property of any school, school bus, or school bus stop; however, a person may carry a firearm:
1. In a case to a firearms program, class or function which has been approved in advance by the principal or chief administrative officer of the school as a program or class to which firearms could be carried;
2. In a case to a vocational school having a firearms training range; or
3. In a vehicle pursuant to s. 790.25(5).
790.25 Lawful ownership, possession, and use of firearms and other weapons.-
(5) 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.
http://licgweb.dos.state.fl.us/downloads/ch790.txt
Most reciprical states (but not all) will honor both resident and non-resident permits.
4) Florida issues concealed carry licenses to qualified individuals regardless of whether or not they are Florida residents. MICHIGAN and NEW HAMPSHIRE will honor the Florida license ONLY IF the license holder is a legal resident of Florida.
http://licgweb.dos.state.fl.us/news/concealed_carry.html