The ground plane seems to be always shown at z=0
I found a way to turn the ground plane off altogether, but what I really want is to have it showing at y=0
Is there a way to do this ?
I added a plane mesh on y=0 and put a grid texture on it 
Why do you think it is called ground plane ?
it is attached to the world Axis at Z=0 which is where the ground is supposed to be Z being in blender the height - This is how Blender sofwtware works and many other too !
Salutations