[peter96]

What length are your springs? 7"?
You may need longer ones or to add tender springs if you are going to keep the springs seated.
When the GCs are lowered, what is the car resting on, the strut shafts?
People have used 8", 9", or even 10" ERS springs, but usually to keep the springs seated on rebound, not compression.
Just remember the lowering limit is in the strut, not the spring length.
Maybe you should check out the motivational shortened setup if drivable lowering is the goal.

 

[peter96]

The longer springs will keep them seated on rebound.
Just don't lower it so much that you bottom out.
You can put a zip tie around your strut shaft at the bottom. Then drive around, later if the zip tie is jammed up in the bump stops, you know you are too low.

Have Fun