I think
Romans 6:23 is explicit, ". . . the gift of God
is eternal life through Jesus Christ our Lord. . . ."
Romans 6:23 is explicit as a statement of fact, but how about as being anything anyone is offering, or told to offer, to receive as a gift, to have Eternal Life?
Accept Eternal life as a gift and be on your way?
How is their sin ever being dealt with?, in awareness or providing a cure for it?
Is there one passage in God's word which specifies those two as a set of gifts?
There is though
Hebrews 6:1, ". . . the foundation of repentance from dead works, and of faith toward God, . . ."
Those two in that passage are said to be Twin Doctrines, as you know, logically sequencial, but otherwise combined together and affectively simultaneous, chronologically.
Because you can't be given faith and then given repentance of having that faith.
Repentance is granted as a gift, as in this next verse, and faith is assumed to accompany it, as implied from the teaching in your Hebrews 6:1 verse.
"When they heard these things, they held their peace, and glorified God, saying, Then hath God also to the Gentiles granted repentance unto life." Acts 11:18;
Speaking of Grace in verse 7, Paul says the faith produced by His grace is the gift of God.
7 That in the ages to come he might shew the exceeding riches of
his grace in
his kindness toward us through Christ Jesus.
8 For
by grace are ye saved through
faith; and that not of yourselves
: it is the gift of God:
9 Not of works, lest any man should boast.
10 For
we are his workmanship, created in Christ Jesus unto good works, which
God hath before ordained that we should walk in them.
The persuasion ". . . no conditions . . . ." matters.
Ephesians 1:4.
The persuasion is that them whom God predestinated, them He also Effectually Calls, through the preaching of the Gospel, and can you hear it by His grace and show evidence that He has granted you repentance. There is no condition on the sinners part except answering whether they have been brought to the end of any dependence on themselves and has God saved them, yet?