Carefully consider the following evidence from Scripture and for each verse ask yourself if Paul's God was a three person being or a one person being.
And immediately [Paul] began to proclaim Jesus in the synagogues, saying, "He is the Son of God." (Acts 9:20).
Of [David's] seed God has brought to Israel a Savior, Jesus, as he promised... God raised him from the dead; and for many days he appeared to those who came up with him from Galilee to Jerusalem, who are now his witnesses to the people. And we bring you the good news that what God promised to the fathers, this he has fulfilled to us their children by raising Jesus; as also it is written in the second psalm, "You are my Son, today I have begotten you.' And as for the fact that he raised him from the dead, no more to return to corruption, he spoke in this way, "I will give you the holy and sure blessings of David.' Therefore he says also in another psalm, "You will not let your Holy One see corruption.' For David, after he had served the counsel of God in his own generation, fell asleep, and was laid with his fathers, and saw corruption; but he whom God raised up saw no corruption. (Acts 13:23-37).
The God who made the world and everything in it, being Lord of heaven and earth, does not live in shrines made by man, nor is he served by human hands, as though he needed anything, since he himself gives to all men life and breath and everything. And he made from one every nation of men to live on all the face of the earth, having determined allotted periods and the boundaries of their habitation, that they should seek God, in the hope that they might feel after him and find him. Yet he is not far from each one of us, for "In him we live and move and have our being'; as even some of your poets have said, "For we are indeed his offspring.' Being then God's offspring, we ought not to think that the Deity is like gold, or silver, or stone, a representation by the art and imagination of man. The times of ignorance God overlooked, but now he commands all men everywhere to repent, because he has fixed a day on which he will judge the world in righteousness by a man whom he has appointed, and of this he has given assurance to all men by raising him from the dead." (Acts 17:24-31).
Paul, a servant of Jesus Christ, called apostle, set apart for the gospel of God, which He promised beforehand through His prophets in the holy Scriptures, concerning His Son, who was born of the seed of David according to the flesh, fixed Son of God in power by the resurrection from the dead, according to the Spirit of holiness, Jesus Christ our Lord. (Romans 1:1-4).
Grace to you and peace from God our Father and the Lord Jesus Christ. (Romans 1:7).
For God is my witness whom I serve in my spirit in the preaching of the gospel of His Son. (Romans 1:9).
For if while we were enemies we were reconciled to God by the death of his Son, much more, now that we are reconciled, shall we be saved by his life. (Romans 5:10).
For we know that Christ being raised from the dead will never die again. Death no longer lords over him. The death he died he died to sin, once for all, but the life he lives he lives to God. (Romans 6:9-10).
For what the Law was not able to do, in that it was weakened through the flesh, God did, sending His own Son in the likeness of the flesh of sin, and concerning sin, condemned sin in the flesh. (Romans 8:3).
If God is for us, who is against us? He who did not spare His own Son, but delivered Him over for us all, how will He not also with him freely give us all things? (Romans 8:32).
Now may the God of patience and comfort grant you to be like-minded toward one another, according to Christ Jesus, that you may with one mind and one mouth glorify the God and Father of our Lord Jesus Christ" (Rom 15:5).
To the only wise God through Jesus Christ be the glory forever. Amen. (Romans 16:27).
Grace to you and peace from God our Father and the Lord Jesus Christ. (1 Corinthians 1:3).
God is faithful, through whom you were called into fellowship with His Son, Jesus Christ our Lord. (1 Corinthians 1:9).
You are of Christ and Christ of God. (1 Corinthians 3:23).
There is no God but one.... For us there is but one God, the Father, from whom are all things and we from Him and one Lord, Jesus Christ, through whom are all things, and we through Him. (1 Corinthians 8:6).
The head of every man is the Christ, and the head of a woman is the husband and the head of Christ is God (1 Corinthians 11:3).
If Christ has not been raised, then our preaching is vain, your faith also is vain. Moreover we are even found to be false witnesses of God, because we testified against God that He raised Christ, whom He did not raise. (1 Corinthians 15:14-15).
Grace to you and peace from God our Father and the Lord Jesus Christ. (2 Corinthians 1:2).
Blessed be the God and Father of our Lord Jesus Christ, the father of mercies and God of all comfort who comforts us in all our affliction, so that we may be able to comfort those who are in any affliction, with the comfort with which we ourselves are comforted by God." (2 Corinthians 1:3-4).
Now He who establishes us with you in Christ and anointed us is God. (2 Corinthians 1:21).
For we are a fragrance of Christ to God. (2 Corinthians 2:15).
Such confidence we have through Christ toward God. (2 Corinthians 3:4).
The light of the gospel of the glory of Christ, who is the image of God. (2 Corinthians 4:4).
For God, who said, "Light shall shine out of darkness," is the One who has shone in our hearts to give the Light of the knowledge of the glory of God in the face of Christ. (2 Corinthians 4:6).
Now all these things are from God, who reconciled us to Himself through Christ and gave us the ministry of reconciliation, namely, that God was reconciling the world to Himself in Christ. (2 Corinthians 5:18-19).
The God and Father of the Lord Jesus (2 Corinthians 11:31).
For he was crucified in weakness, but lives by the power of God (2 Corinthians 13:4).
The grace of the Lord Jesus Christ, and the love of God, and the fellowship of the Holy Spirit, be with you all. (2 Corinthians 13:14).
Grace to you and peace from God our Father and the Lord Jesus Christ. (Ephesians 1:2).
Blessed be the God and Father of our Lord Jesus Christ (Ephesians 1:3).
The God of our Lord Jesus Christ, the Father of glory. (Ephesians 1:17).
There is one body and one Spirit, just as you were called to the one hope that belongs to your call, one Lord, one faith, one baptism, one God and Father of us all, who is above all and through all and in all. (Ephesians 4:4-6).
Do not grieve the Holy Spirit of God, by whom you were sealed for the day of redemption. (Ephesians 4:30).
Peace be to the brethren, and love with faith, from God the Father and the Lord Jesus Christ. (Ephesians 6:23).
Grace to you and peace from God our Father and the Lord Jesus Christ. (Philippians 1:2).
We give thanks to the God and father of our Lord Jesus Christ. (Colossians 1:3).
[We give] thanks to the Father, who has qualified us to share in the inheritance of the saints in Light. For He rescued us from the domain of darkness, and transferred us to the kingdom of His beloved Son. (Colossians 1:12-13).
He is the image of the invisible God, the firstborn of all creation, For in him all things were created, things in heaven and upon earth, visible and invisible, whether thrones or lordships or rulers or authorities; all things were created through him and unto him. And he is before all things, and in him all things subsist. (Colossians 1:15-17).
Having been buried with him in baptism, in which you were also raised up with Him through the faith God working, who raised him from the dead. (Colossians 2:12).
Therefore if you have been raised up with Christ, keep seeking the things above, where Christ is, seated at the right hand of God. (Colossians 3:1).
Whatever you do in word or deed, do all in the name of the Lord Jesus, giving thanks through Him to God the Father. (Colossians 3:17).
For this reason also, God highly exalted him, and bestowed on Him the name which is above every name, so that at the name of Jesus every knee will bow, of those who are in heaven and on earth and under the earth, and that every tongue will confess that Jesus Christ is Lord, to the glory of God the Father. (philippians 2:9-11).
Now to our God and Father be the glory forever and ever. Amen. (Philippians 4:20).
To the church of the Thessalonians in God the Father and the Lord Jesus Christ: Grace to you and peace. (1 Thessalonians 1:2).
For they themselves report about us what kind of a reception we had with you, and how you turned to God from idols to serve a living and true God, and to wait for His Son from heaven, whom He raised from the dead, that is Jesus, who rescues us from the wrath to come. (1 Thessalonians 1:9-10).
Now may our God and Father Himself and Jesus our Lord direct our way to you... establish your hearts without blame in holiness before our God and Father at the coming of our Lord Jesus with all His saints. (1 Thessalonians 3:11-12).
Grace to you and peace from God the Father and the Lord Jesus Christ. (2 Thessalonians 1:2).
The name of our Lord Jesus will be glorified in you, and you in Him, according to the grace of our God and the Lord Jesus Christ. (2 Thessalonians 1:12).
Now may our Lord Jesus Christ himself and God our Father, who has loved us and given us eternal comfort and good hope by grace, comfort and strengthen your hearts in every good work and word. (2 Thessalonians 2:16-17).
Grace, mercy and peace from God the Father and Christ Jesus our Lord. (1 Timothy 1:2).
Now to the King eternal, immortal, invisible, the only God, be honor and glory forever and ever. Amen. (1 Timothy 1:17).
For there is one God, and one mediator also between God and men, the man Christ Jesus. (1 Timothy 2:4).
I solemnly charge you in the presence of God and of Christ Jesus and of His elect angels. (1 Timothy 5:21).
That you should keep the commandment unstained and irreproachable until the appearing of our Lord Jesus Christ and this will be made manifest at the proper time by the blessed and only Power, the King of kings and Lord of lords, who alone has immortality and dwells in unapproachable light, whom no man has ever seen or can see. To him be honor and eternal dominion. Amen.(1 Timothy 6:14-16).
Grace, mercy and peace from God the Father and Christ Jesus our Lord. (2 Timothy 2:2).
I solemnly charge you in the presence of God, and of Christ Jesus who is to judge the living and the dead. (2 Timothy 4:1).
Grace and peace from God the Father and Christ Jesus our Savior. (Titus 1:4).
But when the kindness of God our Savior and His love for mankind appeared, He saved us, not on the basis of deeds which we have done in righteousness, but according to His mercy, by the washing of regeneration and renewing by the Holy Spirit, whom He poured out upon us richly through Jesus Christ our Savior. (Titus 3:4-6).
Grace to you and peace from God our Father and the Lord Jesus Christ. (Philemon 1:3).