"gosh" in Ainu is ayapo (アヤポ). Itak-uoeroskip, a categorised Ainu glossary.
あー、おー、いや、きゃー、おー、ぎゃあ、いやあ、ひゃー、ああいたい
oh!, oh my god, gosh!, my god!, wow!, yikes!
啊!,哦!,哇!,哎呀!