They will join seasoned first players Franco Luwig and Whetu McGhee in the front row, openside flanker James McKay and vice-captain and No.8 Luke Bidois.
Joining Paenga in the backs will be new caps Maioha Waru at centre and speedster Isimeli Vono at fullback.
GBHS director of rugby Mark Jefferson said the squad had been training since late November.
They were keen and proud to be representing the school and were looking forward to putting the training into action.
“I think there are close to 13 or 14 debutants.
“It will be a thrill for them to play in front of their school and the local community. It is an added bit of pressure but I am sure they will relish the opportunity.”
“It’s a great opportunity to compete at the highest level of secondary school rugby in New Zealand. You’re competing against the best. We’re only a small little Heartland province but we punch above our weight”
Jefferson said Puna Hihi was a class act.
“He’s a professional beyond his years and the leader of that group, and the boys will follow him really well.
“It’s his fourth year in the first 15, so he knows how it runs.”
• Today’s game is one of eight for GBHS before the Super 8 competition which they start against Palmerston North Boys’ High on May 25.