Yes, the Holy Ghost is now with sinners, to convict them of their sinning unto repentance. The Holy Ghost is within His believers once repented, to guide them into all truth of God and His word.
Even the Spirit of truth; whom the world cannot receive, because it seeth him not, neither knoweth him:
Unrepented sinners can't receive the Holy Ghost.
And it shall come to pass in the last days, saith God, I will pour out of my Spirit upon all flesh: and your sons and your daughters shall prophesy, and your young men shall see visions, and your old men shall dream dreams:
The Holy Ghost is now shed upon all flesh of men by the resurrection of Jesus Christ from the dead.
Nevertheless I tell you the truth; It is expedient for you that I go away: for if I go not away, the Comforter will not come unto you; but if I depart, I will send him unto you. And when he is come, he will reprove the world of sin, and of righteousness, and of judgment:
The Holy Ghost is now with all sinners to convict them of sinning.
But ye know him; for he dwelleth with you, and shall be in you.
The Holy Ghost is now with and also within all His repented believers.
Howbeit when he, the Spirit of truth, is come, he will guide you into all truth: for he shall not speak of himself; but whatsoever he shall hear, that shall he speak: and he will shew you things to come.
The Holy Ghost is now guiding from within all His repented saints, into all the truth of God and His words.
All sinners are still commanded to repent by God, and has sent His Spirit upon all flesh to convict them of their sinning unto repentance.
All repented saints are now commanded and guided by God to keep His commandments and do His truth. They now have the Spirit and power of Christ going with and within them to keep His Son's faith and commandments, and themselves unspotted with the sinning of the world.
Pure religion and undefiled before God and the Father is this, To visit the fatherless and widows in their affliction, and to keep himself unspotted from the world.
Here is the patience of the saints: here are they that keep the commandments of God, and the faith of Jesus.
This is the gospel of Jesus Christ and His once repented saints from the Bible verses. It's not the unrepentant sinners gospel of Christian religion.