보여줄 게

something to show

→ 보여주다
phrase Uncommon #11,099
something to show 게 is a shortened form of 것이. In phrases like 보여줄 게 있어, it means there is something to show or someone has something to show.
KO: 친구들에게 보여줄 게 있어요.
EN: I have something to show my friends.

보여줄 게 있어요

I have something to show you

— 폴링 다운 (1993)

보여줄 게 있다, 봐!

I have something to show you, look!

— 보리밭을 흔드는 바람 (2006)

또 보여줄 게 있어요

I have something else to show you.

— 인생은 아름다워 (1997)

보여줄 게 있다

I have something to show you.

— 라따뚜이 (2007)