Gauss points in cells

How can I add gauss points in cells (triangles, quadrilaterals, lines) in unstructured grid?
Adding interpolate points, for example?

There’s been discussion on and off about this, so I’m sure others will add some thoughts.

Conceptually, a simple approach is basically to package up the information you need in cell data. This information can then be transferred into the methods that need it (filters, cell operations) through a variety of means. The particulars of how you package the information, and how it is transferred, is where a lot of discussion needs to take place.

Thank you for your attention.

Therefore if I have triangles with 3 gauss points and my results have 3 components, I can write tuples of 9 values for each triangle. Then I will find how to integrate it to show correctly, for example filters.