Where on my S3 can I find the punctuation button to type a "guillemets"? I want to type the French and German style "guillemets" marks (« or ») on my mobile.  Where on my keyboard is it?

OS: 4.1.1

Galaxy S3
Apparently the stock keyboard does support it, as wbogacz's answer shows. I was not aware of this, as I never used the stock keyboard.

Evidently those aren't guillemets on the stock keyboard.

I do not believe the stock keyboard supports this.  You'll need to use an alternative keyboard to get this functionality.

Using an alternative keyboard is another way to get this functionality which is a bit easier to access.

One keyboard I know of that supports it is Hacker's Keyboard, which is the keyboard I use myself.

To type « and » on that keyboard, you do a long press on the circle button (at the bottom-right.  It acts as the compose key in this context), release it, and then type &lt;&lt; or >> respectively

To get ‹ and ›, you do the same and type .&lt; or .>

An exhaustive list of all the supported compose key combinations can be found here.