The Free Gift
If you're wondering what it is, then let's look in the book of Romans, chapter 5, where Paul compares the contrast between the fall of Adam, which brought about judgement and condemnation, and the free gift of the sacrifice of Jesus Christ on the cross, which brought justification and eternal life.

Romans 5:

16 And the gift is not like that which came through the one who sinned; for on the one hand the judgment arose from one transgression resulting in condemnation, but on the other hand the free gift arose from many transgressions resulting in justification.
17 For if by the transgression of the one, death reigned through the one, much more those who receive the abundance of grace and of the gift of righteousness will reign in life through the One, Jesus Christ.
18 So then as through one transgression there resulted condemnation to all men, even so through one act of righteousness there resulted justification of life to all men.
19 For as through the one man's disobedience the many were made sinners, even so through the obedience of the One the many will be made righteous.
20 And the Law came in that the transgression might increase; but where sin increased, grace abounded all the more,
21 that, as sin reigned in death, even so grace might reign through righteousness to eternal life through Jesus Christ our Lord.

The free gift is life eternal and according to Romans chapter 10, here is how you get it:

9 that if you confess with your mouth Jesus as Lord, and believe in your heart that God raised Him from the dead, you shall be saved;
10 for with the heart man believes, resulting in righteousness, and with the mouth he confesses, resulting in salvation.
11 For the Scripture says, "WHOEVER BELIEVES IN HIM WILL NOT BE DISAPPOINTED."
12 For there is no distinction between Jew and Greek; for the same Lord is Lord of all, abounding in riches for all who call upon Him;
13 for "WHOEVER WILL CALL UPON THE NAME OF THE LORD WILL BE SAVED."

Call upon the name of the Lord right now and receive that wonderful gift that He has given to all.

God holds your life in the palms of his hands. Can you trust him with it?