Grid lines from grasshopper

I have a surface as a plane in rhino and when I use gridlines in grasshopper, they show up in rhino but I cannot hide them. Is there anyway to hide those gridlines in rhino made from grasshopper?

You should check out the Grasshopper basics…

To switch off preview, click the leftmost of six buttons in the upper right corner of the Grasshopper window. It’s context text says ‘Don’t draw any preview geometry’.