Notice this:
Matthew 24:3
3And as he sat upon the mount of Olives, the disciples came unto him privately, saying, Tell us, when shall these things be? and what
shall be the sign of
thy coming, and of the
end of the world?
1 Corinthians 15:23-24
23But every man in his own order: Christ the firstfruits; afterward they that are
Christ's at his coming.
24Then cometh the end, when he shall have delivered up the kingdom to God, even the Father; when he shall have put down all rule and all authority and power.
Christ comes first then the end.
Notice how the end is described after Christ comes.
Matthew 24:37
37But as the days of Noe were, so shall also the coming of the Son of man be.
1 Corinthians 15:25
25For he must reign, till he hath
put all enemies under his feet
2 Peter 3:10
10But the day of the Lord will come as a thief in the night; in the which
the heavens shall pass away with a great noise, and the
elements shall melt with fervent heat,
the earth also and the works that are therein
shall be burned up.
If this happened before the GT then there'd be no place to have a GT at.