"According to Ubisoft, Ghost Recon Breakpoint will require a persistent Internet connection even while playing single-player"
So i highly doubt it.
game requires you be online. Any removal of internet the game closes. it's stupid, but that's how they programmed it.
so enjoy the trainer while it works and see as much content as you can. We have no idea if they will eventually make it where you cannot use the trainer.
For what its worth, it appears you cannot play PvP part of the game without the anticheat active, which is good news. We don't condone online PVP cheating.