My goodness, the spiritually dead in Hell are called up to Judgment in Rev. 20, and then cast into the Lake of Fire, along with Hell itself.
You are very confused, Matthew! It doesn't say they are outside the gates of New Jerusalem, it says they are without....
If you read the previous verse, they are WITHOUT the right to the Tree of Life.
They were cast into the Lake of Fire in Rev. 20 and that's where they will be forever.
It always turns out this way, but hopefully some that aren't familiar with the subject can look for themselves and see the truth.