When Jacob woke up from his sleep in which he dreamed of the angels of God ascending and descending the ladder that led from earth up to heaven, he expressed and said that the place where he was, was the house of God and that place was the gate of heaven. The gate of heaven implies that the one who enters through that gate would be able to enter into heaven.

Points to ponder:
When Jesus spoke with Nathaniel and Nathaniel believed that Jesus was the Son of God and the King of Israel, Jesus assured him saying that thereafter he shall see heaven open and the angels of God ascending and descending upon him, the Son the man (John 1:51). In other words, Jesus is Jacob’s ladder, the gate of heaven. Jesus said, that he is the gate (door) and if any man enter by him, he shall be saved and shall go in and out and find pasture (John 10:9). Jesus is The gate of heaven – there is no other gate by which man can enter into heaven. The question is have you believed in him i.e., have you entered into the gate of heaven?

Genesis 28:12,17 (KJV)
12 And he dreamed, and behold a ladder set up on the earth, and the top of it reached to heaven: and behold the angels of God ascending and descending on it.
…
17 And he was afraid, and said, How dreadful is this place! this is none other but the house of God, and this is the gate of heaven.

John 1:51 (KJV)
51 And he saith unto him, Verily, verily, I say unto you, Hereafter ye shall see heaven open, and the angels of God ascending and descending upon the Son of man.

John 10:9 (KJV)
9 I am the door: by me if any man enter in, he shall be saved, and shall go in and out, and find pasture.