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Teachers,

If you are to tell a person that he has aged, which of followings are colloquially correct to use?

You've gotten old./You have gotten old.
You've got old./You have got old.
You got old.

Similarly, you're with a friend discussing about someone else,

He's gotten old./He has gotten old.
He's got old./He has gotten old./
He got old.

Please help, thank you.
Comments  
You've gotten old. Although this isn't the most polite thing to say. How about:
You've matured (with the years).
You've aged.
You look older now.
Similarly when talking about a friend:
S/he's gotten old.
S/he's aged.
S/he looks older now.
Hi,

If you are telling at the moment how he has gotten old over the years, I think it is correct to say "He has gotten old."

Like wise, if you are talking with your friends about the fact that he has gotten old over the years, I think it is correct to say the same thing, "He has gotten old."

I think it is not correct to write:

You've got old or He's got old.

Why the present perfect? I think it is because the fact he has gotten old is pertinent at the moment and he hasn't passed away.

Please wait for other responses.