The answer is, as strongly as I can word it - "Very likely", that 1 Cor 12:4-6 mentions all three members of the Godhead. It is more certain if we include the previous verse as follows and quote 1 Cor 12:3-6
Therefore I inform you that no one who is speaking by the Spirit
of God says, “Jesus be cursed,” and no one can say, “Jesus is
Lord,” except by the Holy Spirit. There are different gifts, but
the same Spirit. There are different ministries, but the same
Lord. There are different ways of working, but the same God works all things in all people.
Thus, it appears a neat, nested literary pattern Paul employs to drive the point home.
There are plenty of other places where the three members of the Godhead are explicitly listed such as:
- Matt 3:16, 17 -As soon as Jesus was baptized, He went up out of the water. Suddenly the heavens were opened, and He saw the Spirit of God descending like a dove and resting on Him. And a voice from heaven said, “This is My beloved Son, in whom I am well pleased!” See also Mark 1:10,11, Luke 3:21, 22,
- Matt 28:19 - Therefore go and make disciples of all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Spirit
- John 14:26 - But the Advocate, the Holy Spirit, whom the Father will send in My [ = Jesus'] name, will teach you all things and will remind you of everything I have told you.
- John 15:26 - When the Advocate comes, whom I will send to you from the Father—the Spirit of truth who proceeds from the Father—He will testify about Me [ = Jesus].
- John 16:15 - Everything that belongs to the Father is Mine [ = Jesus]. That is why I said that the Spirit will take from what is Mine and disclose it to you.
- Acts 2:33 - Exalted, then, to the right hand of God, He [= Jesus] has received from the Father the promised Holy Spirit and has poured out what you now see and hear.
- Acts 10:38 - how God anointed Jesus of Nazareth with the Holy Spirit and with power, and how Jesus went around doing good and healing all who were oppressed by the devil, because God was with Him.
- Rom 1:1-4 - Paul, a servant of Christ Jesus, called to be an apostle, and set apart for the gospel of God— the gospel He promised beforehand through His prophets in the Holy Scriptures, regarding His Son, who was a descendant of David according to the flesh, and who through the Spirit of holiness was declared with power to be the Son of God by His resurrection from the dead: Jesus Christ our Lord.
- Rom 8:9 - You, however, are controlled not by the flesh, but by the Spirit, if the Spirit of God lives in you. And if anyone does not have the Spirit of Christ, he does not belong to Christ.
- Rom 15:30 - Now I urge you, brothers, by our Lord Jesus Christ and by the love of the Spirit, to join me in my struggle by praying to God for me.
- 1 Cor 6:11 - And that is what some of you were. But you were washed, you were sanctified, you were justified, in the name of the Lord Jesus Christ and by the Spirit of our God.
- 2 Cor 13:14 - The grace of the Lord Jesus Christ, and the love of God, and the fellowship of the Holy Spirit be with all of you.
- Gal 3:11-14 - Now it is clear that no one is justified before God by the law, because, “The righteous will live by faith.” The law, however, is not based on faith; on the contrary, “The man who does these things will live by them.” Christ redeemed us from the curse of the law by becoming a curse for us. For it is written: “Cursed is everyone who is hung on a tree.” He redeemed us in order that the blessing promised to Abraham would come to the Gentiles in Christ Jesus, so that by faith we might receive the promise of the Spirit.
- Gal 4:6 - And because you are sons, God sent the Spirit of His Son into our hearts, crying out, “Abba, Father!”
- Eph 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. [Compare John 16:13]
- Eph 2:18 - For through Him [ = Jesus] we both have access to the Father by one Spirit.
- Eph 2:22 - And in Him [= Jesus] you too are being built together into a dwelling place for God in His Spirit
- Titus 3:5, 6 - But when the kindness of God our Savior and His love for mankind appeared, He saved us, not by the righteous deeds we had done, but according to His mercy, through the washing of new birth and renewal by the Holy Spirit. This is the Spirit He poured out on us abundantly through Jesus Christ our Savior.
- Heb 9:14 - how much more will the blood of Christ, who through the eternal Spirit offered Himself unblemished to God, purify our consciences from works of death, so that we may serve the living God!
- Heb 10:29 - How much more severely do you think one deserves to be punished who has trampled on the Son of God, profaned the blood of the covenant that sanctified him, and insulted the Spirit of grace?
- 1 Peter 1:2, 3 - according to the foreknowledge of God the Father and sanctified by the Spirit for obedience to Jesus Christ and sprinkling by His blood:
- 1 Peter 3:18 - For Christ also suffered for sins once for all, the righteous for the unrighteous, to bring you to God. He was put to death in the body but made alive in the Spirit
- 1 Peter 4:14 - If you are insulted for the name of Christ, you are blessed, because the Spirit of glory and of God rests on you.
- Jude 20, 21 - But you, beloved, by building yourselves up in your most holy faith and praying in the Holy Spirit, keep yourselves in the love of God as you await the mercy of our Lord Jesus Christ to bring you eternal life.
