Which brings up a litany of other problems.
If the GT began in 2007, then we are no longer in the Church Age and the GT is going to be the least of problems for those who have been left behind.
Next, why are they teaching this? If we are no longer in the Church Age, then there is no more need for teaching, because His Word is written in our hearts and minds, no more need for teaching.
Next, this implies there are ongoing events the likes of which the world has never seen nor endured. Don’t think so.
IMHO, it’s a great opportunity to return to Him and study His Word through faith in Him, so that we might be properly prepared when we find ourselves at the right place and right time to perform per His Plan as we are all to bear our own cross, just as our Lord and Savior Christ Jesus bore His in obedience to the Father and provided by the power of God the Holy Spirit.
You assume that the Church Age has to end before the seven years begin. The post-tribs don’t accept that model. They (the futurist post-tribs) hold that the seven years are the conclusion of the Church Age.