Jesus and New Testament authors repeatedly apparently talk about the Father as Jesus' God. [This Biblical Unitarian article][1] collects some examples:

> >Ephesians 1:17  
> I keep asking that the God of our Lord Jesus Christ, the glorious
> Father, may give you the spirit of wisdom and revelation, so that you
> may know him better.
>
> >Revelation 1:6  
> And has made us to be a kingdom and priests to serve his God and
> Father– to him be glory and power for ever and ever! Amen.
>
> >Revelation 3:12  
> Him who overcomes I will make a pillar in the temple of my God. Never
> again will he leave it. I will write on him the name of my God and the
> name of the city of my God, the new Jerusalem, which is coming down
> out of heaven from my God; and I will also write on him my new name.  
>
> Even in the book of Revelation (after his death, resurrection, and
> ascension), when Jesus has all authority in Heaven and on Earth,
> seated at the right hand of God, he still says “my God.”
>
> >1 Peter 1:3  
> Praise be to the God and Father of our Lord Jesus Christ! In his great
> mercy he has given us new birth into a living hope through the
> resurrection of Jesus Christ from the dead
>
>> John 20:17 (NASB)  
> Jesus said to her, “Stop clinging to me, for I have not yet ascended
> to the Father; but go to my brethren, and say to them, ‘I ascend to my
> Father and your Father, and my God and your God.’”
>
>> Romans 15:6  
> So that with one heart and mouth you may glorify the God and Father of
> our Lord Jesus Christ.
>
>> 2 Corinthians 1:3  
> Praise be to the God and Father of our Lord Jesus Christ, the Father
> of compassion and the God of all comfort.
>
>> 2 Corinthians 11:31 (KJV)  
> The God and Father of our Lord Jesus Christ, which is blessed for
> evermore, knoweth that I lie not.

To this can be added other verses, such as Hebrews 1:8-9.

> "But **about the Son** He says: “Your throne, O God, endures [alt. 'Your throne is God'] forever
> and ever, and justice is the scepter of Your kingdom. 9 You have loved
> righteousness and hated wickedness; therefore **God, Your God**, has
> anointed You above Your companions with the oil of joy.”" (Berean Study Bible)

The assertions that Jesus has a God cut across the New Testament, including St. Peter, St. Paul, St. John, and the author of Hebrews' writings. They are made both by Jesus himself before he ascends, and by others after He ascends.

According to Trinitarian theology, does only God the Son have a God? Or does God the Father also? God the Holy Spirit?


  [1]: https://www.biblicalunitarian.com/articles/does-jesus-christ-have-a-god