There are four different ways to fold the square in half, however there are no different ways to fold the letter G.
A square has four symmetry lines.
Each symmetry line splits the square in half.
This indicates that the square can be folded into one half along any of its lines of symmetry.
As a result, there are four different methods to fold the square in half.
There is no symmetry line in the letter G.
This indicates the letter can't be folded such that the two parts are exactly aligned.
As a result, there are no methods to fold the letter G.