Please help me find in the Bible where it said that God and Jesus and the Holy Ghost are one it is called the Trinity

189 The first "profession of faith" is made during Baptism. The symbol of faith is first and foremost the baptismal creed. Since Baptism is given "in the name of the Father and of the Son and of the Holy Spirit", [Mt 28:19.] the truths of faith professed during Baptism are articulated in terms of their reference to the three persons of the Holy Trinity. [1237, 232]

God Bless and have a great day!

Here are some more verses and explanations that I hope will be helpful:
Jesus himself affirms that God is "the one Lord" whom you must love
"with all your heart, and with all your soul, and with all your mind,
and with all your strength".
At the same time Jesus gives us to understand that he himself is "the Lord".
To confess that Jesus is Lord is distinctive of Christian faith.
This is not contrary to belief in the One God. Nor does believing
in the Holy Spirit as "Lord and giver of life" introduce any division into the One God:

Being a work at once common and personal, the whole divine economy
makes known both what is proper to the divine persons, and their one
divine nature. Hence the whole Christian life is a communion with
each of the divine persons, without in any way separating them.
Everyone who glorifies the Father does so through the Son in the
Holy Spirit; everyone who follows Christ does so because the Father
draws him and the Spirit moves him.
Jn 6:44 No man can come to me, except the Father which hath sent me draw him:
and I will raise him up at the last day.
Rom 8:14 For as many as are led by the Spirit of God, they are the sons of God.

260 The ultimate end of the whole divine economy is the entry of God's
creatures into the perfect unity of the Blessed Trinity. [Cf. Jn 17:21-23.]
But even now we are called to be a dwelling for the Most Holy Trinity: "
If a man loves me", says the Lord, "he will keep my word, and my Father
will love him, and we will come to him, and make our home with him":
[Jn 14:23.]

The word 'trinity' is not used as far as I have seen in the Bible, but neither are a lot of other words like 'nativity', 'eucharist', 'christening', etc. that were coined during the time of the early church as it grew and evolved into what it is today.

There is no place in the Bible that says that. I searched that already.