goes missing

Hi, there.
Here is an example: "Maiami boy goes missing".
Could you please point out the meaning of that "goes missing" ?
Thanks in advance.

If someone has 'gone missing', nobody knows where they are; they cannot be found.

So, that is the same as "Maiami boy has gone missing", isn't it?
"Present Simple" is used instead of "Present Perfect" as a common rule in US?
Anyway "has gone missing" sounds redundant for me unless
"has gone = has missed", so that would be "has missed missing"...

Miami Boy Goes Missing was probably a headline. The present simple is frequent used in headlines.

'Go missing' is a common, if not particularly formal expression. There is no redundancy there.