The GMT hand on this model is independently adjustable using crown position 2. Rotating the crown backwards will increment the GMT hand anti-clockwise in 1 hour jumps according to the 24 hour scale.
If you set the normal hour hand exactly to an hour marker, the GMT hand should point exactly to an hour marker on the 24 hour scale. You have to decide what GMT offset you want if any, between your local time and a second time zone like GMT. That the whole reason for a GMT watch.
Pressing the four hands on a GMT watch can be challenging and sometimes even the factories don't get it exactly right. If your hour hand is exactly on an hour marker and your GMT hand is not (on the 24 hour scale), then the hands were not pressed correctly and would have to be removed and re-pressed to fix that.
Sometimes with rep GMT movements, there is slop in the gears that can result in a hand jumping when the crown is used. This can be annoying - you may have the hand where you want it and then it jumps on you. You can try to anticipate the jump and set the hand short of where you want it and let it jump to where it's supposed to be.
Some GMTs to look at for hands positions