As some keep asking the same question, whether willfully or out of lack of sufficient knowledge, here is the first repost of some posts on why God the first Person of the Holy Trinity is Father and not mother:
Israel has not known Me and My people have not understood Me (Is 1:3)
It has become common these days, especially among modernists and feminists, to conceive of God the first Person of the Holy Trinity as mother rather than Father, even using the term “She” rather than “He.” However, regardless of who may write it, say it or claim it, such socio-theological revisionism is not based in fact, being therefore an implicit if not explicit distortion of both doctrine and the deposit of Faith, because “the Father therefore establishes the Son in eternity by His integral self-giving, while the Son continually affirms the Father as Father from all eternity by the fact that He both accepts His own coming into existence through the Father and also gives Himself to the Father as Son” (Staniloae, D. 1994. The experience of God: Revelation and knowledge of the Triune God, p. 257).
Jesus Christ specifically referred to God the first Person as Father and even Abba throughout Scripture (e.g., Mt 6:9-13, 11:27, 25:34, 26:39-42; Mk 14:36; Lk 2:49, 10:22, 11:2-4, 22:42, 23:46, 24:49; Jn 12:27, 17:1, 17:6, 17:25, 20:17) – in Aramaic tradition, an intimate name that only a natural son or daughter would use in relation to their father. Christ also referred specifically to the Virgin Mary as Mother whom She really was. Moreover, God the first Person Himself specifically expressed His desire to be known as and called Father by His human creatures, namely “I thought you would call me, ‘my Father’ (Jer 3:19) and as confirmed by the Apostle Paul (Gal 4:6; Rom 8:15, 8:29).