You can see the Geminid meteors all around the sky. However if you see a meteor and imagine its path backwards, it should take you back to Pollux, one of the two bright stars of
the constellation Gemini. We see the Geminids as if they were all originating there - that point is called
the radiant.
If that's not where a meteor seems to originate, it's what we call a
sporadic. These are the ones that are seen every night coming from random direction. The excitement of a meteor shower isn't their origins, but that you're likely to see lots more meteors than usual.
The peak is expected late night/early morning of December 13/14, but Geminids are already being spotted.