Why do we refer to the Church as feminine if God is male, and he founded the Church?
Here are two reasons:
The Church is His Bride.
The Church nurtures us, like a mother her children, and we owe Her the filial devotion that a child owes its mother.
… and perhaps more practically, the Latin word for church is of the feminine gender.
It is rather taken from a Greek word ‘ekkalein’ (and that is feminine gender) where in the New Testament refers to local community of believers.
here a short origin of this word