GLOC- I notice becomes a problem with all or some passengers based on the framerate of the game and the modules installed.
Try uninstalling any unnecessary modules and see if you still get the GLOC. I agree with aus_pilot. I either do it right or
burn up long before Gs become a factor. If Gs are even a factor at all, it can be due to high speed/high bank angle. Either
way- instantaneous high Gs will kill. Try a longer approach with lower descent angle.