Greetings Ellsworth1943,
The timing of the gathering of the church cannot be found by any one scripture saying "here is where the church is gathered." It is understood by the cross-referencing and comparing of all related scriptures. That said, the seals, trumpets and bowl judgments are how God is going to carry out His wrath during that last seven years. It is the fulfillment of the long prophesied day of the Lord. Regarding God's coming wrath, scripture states the following:
"They tell how you turned to God from idols to serve the living and true God, and to wait for his Son from heaven, whom he raised from the dead—Jesus, who rescues us from the coming wrath. - 1 Thes.1:9-10
"But since we belong to the day, let us be sober, putting on faith and love as a breastplate, and the hope of salvation as a helmet. For God did not appoint us to suffer wrath but to receive salvation through our Lord Jesus Christ." - 1 Thes.5:9
"Because you have kept the word of My patient endurance, I also will keep you out of the hour of the trial being about to come upon the whole inhabited world, to try those dwelling upon the earth" - Rev.3:10
Now, what many do in order to protect their positions is to say that the wrath that is being spoken of in the scriptures above is that the final wrath in the lake of fire, which they are not. The point is moot anyway because those who have received Christ have been credited with righteousness and have been reconciled to God and therefore will not be exposed to God's coming wrath upon this earth nor condemning judgment in the lake of fire.
Another explanation that people will give is that God is going to protect His church while in the midst of his wrath. Anyone who says this does not understand the severity and magnitude of God's coming wrath via the seals, trumpets and bowl judgments. With just the 4th seal and 6th trumpet alone (a fourth and a third respectively), over half of the earths population will be killed and that is not including the fatalities that will be caused by trumpets 1,2 and 3 nor the fatalities resulting in the bowl judgments, which are just not mentioned. Instead of protecting the righteous in the midst of God's wrath, the Lord will keep His promise by removing His church prior to His coming wrath.
But in answer to your question, the closest scripture that we can come to that demonstrates that the church is in heaven while God's wrath is being poured out upon the earth is found in Rev.19:6-8 and 14:
"Hallelujah! For our Lord God Almighty reigns.
Let us rejoice and be glad and give him glory! For the wedding of the Lamb has come, and his bride has made herself ready. Fine linen, bright and clean, was given her to wear." - Rev.19:6-8
"And the armies who were in heaven, having been clothed in fine line, white and clean were following Him upon white horses." - Rev.19:14
Now, Rev.19:6-8 shows the bride which is another designation for the church, receiving her fine linen, white and clean at the wedding of the Lamb in heaven. Then verse 14 shows that same group following Christ out of heaven riding on white horses and wearing the same fine linen, white and clean that she will have previously received at the wedding of the Lamb. The point being is that, the church, as the bride, is seen in heaven receiving her fine linen and then is seen following the Lord out of heaven as he returns to the earth to end the age. in order to follow the Lord out of heaven, you would have to already be in heaven. In further support that the church will have already been gathered in heaven and will be following the Lord out of heaven, we have the following:
"They will wage war against the Lamb, but the Lamb will triumph over them because he is Lord of lords and King of kings—and with him will be his called, chosen and faithful followers.”
The scripture above is in reference to when the Lord returns to the earth to end the age as detailed in Rev.19:11-21. The reference to "They will wage war against the Lamb" is referring to the nations gathered at Armageddon. And returning with the Lord will be His "called, chosen and faithful followers," i.e. the church which will have been gathered and will be following the Lord out of heaven.
I hope that you will honestly consider the proof that can be found in these scriptures, for they demonstrate that the church will be gathered prior to God's wrath and will be returning to the earth with the Lord to end the age and establish His millennial kingdom.
The point to this is that, since the wrath of God begins with the opening of that first seal, then the church must be gathered prior to when it is opened.
