I am totally new to Grasshopper so I am wondering if it is possible to export the mesh to list of vertex and list of faces?
export to what?
you can right click Stream Contents
There are a few plugins to assist excel output/input formatting as well.
May I know what plugin you uses in this diagram?
And what plugins that support excel I/O
Those are native grasshopper components.
Lunchbox is what i use.
There are no plugins there. They are native Gh components, the names of each are written over the components.