God has two elect groups upon earth --
Israel (
Romans 11:28) and the Church (
1 Peter 1:2). The signs of
Matthew 24 are presented to elect Israel.
We know this to be true because of the regard for the Sabbath Day (vs. 20), synagogues (
Luke 21:12), and because the setting is Jerusalem (vs. 20).
These signs are for Israel who is looking for the return of her King in
Revelation 19. They are not signposts for the Rapture.
The gospel mentioned in
Matthew 24:24 is the gospel of the kingdom that the King is about to return (
Revelation 19:16)
Although the signs are completely fulfilled after the Christians are gone, we already see the beginnings of every on of these prophecies (
Luke 21:28).
Matthew 24 is spoken to Israel rather than the Church. The signs are not pre-Rapture signals but post-Rapture signposts for Israel.
They point to the coming of Christ to this earth as King of Kings and Lord of Lords (
Revelation 19:11-16).