if you have the event where the Golden Child becomes an adult, would the GC die when it is old enough?

Where did you hear of such an event?

boy i would be happy

i think i saw someone's post about an event where they become an adult and i wanted to know if that could happen to the GC.

I think you have it backwards. The event is an adult becoming a child. The GC can be the 'target' of Island Events, but not events that require an adult.

oh, sorry.