Lost Child
Lost Person, Stray Animal
noun
A child that's astray is a lost child. Help them home, don't invite them into your windowless van, please.
The reading for 迷 is an exceptional reading. The ご comes from こ. Think of the まい as the child asking: "Where is my (まい) mommy???"
迷子の子どもの両親を探してあげようとしていただけなのに、誘拐未遂で起訴されてしまいました。
I was just trying to find the parents of a lost child, but I was accused of attempted kidnapping.