Secure smartphone-operated gun lock with means for overriding release of the lock

A gun lock device, which may be configured to be disposed on or adjacent a gun to alternatively prevent or enable firing, includes a data receiver, a data memory and a logic device for determining whether a potential gun user's biologic data received by the receiver is the same, or substantially the same, as biologic data stored in the data memory. A separate smartphone is provided to collect and transmit the biologic data to the data receiver of the gun lock device. The logic device also responds to a gun control signal transmitted by the smartphone to lock the gun when the smartphone is located in a proscribed area, such as within a school zone or outside a secured area such as an airport or shopping mall.