How to build grid ground through discreate points?
Can you post an image of what you are trying to construct?
I think you are trying to make a mesh (triangles) from a list of points, correct?
This is a task that can be done for instance with the ball-pivot algorithm, the crust algorithm or related algorithms. There is no implementation in Rhino for this, you need to code it yourself.
You can use Grasshopper’s Delaunay triangulation functionality to achieve this.