Well if they bought seating seats then they are sitting If they bought seats for Croker there is a seating chart for it on ticketmaster.ie
If they bought seating for UK shows I have no clue but am presuming the seats are at the side.
If they got GC standing then yes they get into the GC pit at the front of that stage as far as we know...

Are you in Dublin? Even if you do have exams on the day you could still make it