A gas control valve featuring magnetic control and a gas ignition system having the same are disclosed. The gas control valve includes a main body and a magnetic control assembly. The main body has a valve base and a control lever. The control lever is movably connected to the valve base. The magnetic control assembly has a magnetic member and a magnetic control switch. The magnetic member is installed in one of the valve base and the control lever, while the magnetic control switch is installed in the other of the valve base and the control lever. When the control lever moves to an ignition position, the magnetic control switch is affected by the magnetic member and forms a closed circuit. The magnetic control assembly is incorporated in the gas control valve in a modularized manner, and can be easily maintained and repaired.