The problem with gojet is not really about the union, it's about why and how the company was set up as an "alter-ego" carrier. Lot's of reading on this subject on the various forums...also look up Freedom Airlines (specifically Freedom A).
The gojet boyz are so despised that when they walk around the airport, they turn their airline badges around so you can't tell who they work for (but we all know
). They are afraid to visit pilot crew rooms, so you see them hanging out in small groups in unused gate areas like lepers. Is that the airline dream job you're looking for? You can tell your friends and family that you fly a nice big jet and they will eat it up...but they won't know what YOU know: that the majority of airline professionals actually hold you in contempt.
As for your career, you might well slip by...or maybe some some ex-TSA or ex-mesa pilot will be conducting your job interview or simulator training and be in the position to subjectively fail you. I certainly would, and Southwest Airlines posts a list of all prospective new hires in their crew room...if somebody doesn't like your name on that list they can create a real problem for you. I can assure that there are ex-TSA pilots at SWA...
If you can't wait until you get another couple hundred hours, then go to mesa instead (I would go back to CFI before mesa though).