"Gas cooker" and "gas stove" basically refer to the same type of kitchen stove, the main difference between them is the fuel used.
Gas stoves are kitchen stoves that utilize natural gas (mainly methane, ethane, etc.) as fuel. Natural gas is a clean fuel that is easy to use, highly efficient in cooking, and more environmentally friendly and safer than gas stoves. When using it, you need to provide your own gas tank or connect to the city gas pipeline.
The gas cooker is a kitchen stove that uses gas (also known as "gas ball", a product of coking ovens) as fuel. The use of gas stoves requires the installation of gas tanks and piping, which is not very convenient, and at the same time, gas is prone to pollute the surrounding environment, so it has been gradually phased out and is no longer widely used in most areas.