Is it necessary to put the gate in the middle?

Not necessarily. Some villa doors are not in the middle of the house. Please pay attention to this unless you have faith. You can also choose the location of the gate according to local conditions. From the perspective of geomantic omen, there are many stresses on the front door: the front door of the house is good in geomantic omen, which can bring good luck to the family and gather gas to make money. A good geomantic omen should be built at the residential door.