Hello Victor123456789
In theory, my dear colleague Reto is right.
In case of a delay (railway fault), you can use the GA night on a the train, whose scheduled departure is before 19:00, and the actual departure is after 19:00.
It does not apply for on-time departure, not even 1 minute earlier.
If it is you going to delay the train for two minutes, just to make sure your GA will be accepted, it will cost you a hefty fine, however.
Kind regards,
Roland