gui design - What is the UI pattern used for managing people in Google+ called?

I've tried to find more info on this particular UI pattern Google+ exposes, and I'm sure I've seen it before, but still, I haven't been able to find references to it.

If you go to the Circles section of Google Plus, you will see, besides the circles, a set of "cards" that represent your friends. You can see that all rows are consistent and that if you resize the browser, the cards will rearrange to maximize the use of the space, making the rest fall down to form new dynamic rows.

What is that UI pattern called?

Answer

Your questions seems a bit misleading for me. Is your question about:

1. 
   

   how the google+ circles layout is called? - there is no UX/UI pattern for this, Google+ introduced the new Circles concept

   
   


2. 
   

   "You can see that all rows are consistent and that if you resize the browser, the cards will rearrange to maximize the use of the space, making the rest fall down to form new dynamic rows." - the answer for this is responsive or fluid layout

   
   

Here's an article about Fixed, Responsive or Fluid layouts