Godhead does not mean 1, 2, 3...
Father, Son and Holy Spirit.
It means DIVINITY.
God is not a trinity of three gods, or three gods in one.
"And this is life eternal, that they might know thee the only true God, and Jesus Christ, whom thou hast sent." John 17:3
The following information is taken from trinitytruth.org:
In the 100,000 pages Ellen White wrote, she called the Holy Spirit the “third person” in four quotes and called the Holy Spirit a “person” twice. This is unfortunate as it has caused many to wrongly conclude that she was a Trinitarian.
Ellen White taught that the Holy Spirit is the Spirit of Christ, and so it was actually the Spirit of Christ she called a person. Now do not get confused by this next statement.
Ellen White revealed “3 PERSONS,” but only “2 BEINGS.”
Did you get that? Are you confused? Because there is no need to be. There is no confusion once you know what else she wrote and taught in regards to the Holy Spirit.
Do not miss this next extremely important point. Ellen White demonstrated a distinction between the words “PERSON” and “BEING.” While she speaks of three “persons” or “personalities” and “powers”, she consistently identifies “ONLY” two beings -- the Father and His Son.
So the words “PERSON” and “BEING” have different meanings to Ellen White. If you miss this you could end up thinking the Holy Spirit is another “BEING” as the Catholic Church made up over 200 years after the Bible was written and hence could never have come from the Bible anyway.
Since the Holy Spirit is the “third person,” then whoever Ellen White says is the Holy Spirit has to be the “third person.” So who is the “third person” according to Ellen White? Who did she say is the Holy Spirit?
“The HOLY SPIRIT is the SPIRIT of CHRIST; it is His representative.” — (Ellen G. White, 13MR 313.3, 1895)
“CHRIST has left HIS HOLY SPIRIT to be HIS representative in the world,” — (Ellen G. White, Lt84, October 22, 1895)
“The HOLY SPIRIT is the SPIRIT of CHRIST, which is sent to all men to give them sufficiency,” — (E.G. White, 14MR 84.3)
“We want the HOLY SPIRIT, which is JESUS CHRIST.” — (Ellen G. White, Lt66, April 10, 1894)
“but it is the leaven of the SPIRIT of JESUS CHRIST, which is sent down from heaven, called the HOLY GHOST,” — (Ellen G. White, Ms36-1891)
“When God's people take the position that they are the temple of the HOLY GHOST, CHRIST HIMSELF abiding within, they will so clearly reveal Him in spirit, words and actions,” — (Ellen G. White, Ms100-1902)
As you can see the “third PERSON” is not a “third BEING” but the Spirit of Christ, and hence the Spirit of Christ is the “third person” by her terminology.