Google Classroom Feedback with iPad Pro

Hello!

I am interested in providing feedback on my students' work in Google Drive via Apple Pencil, after they've submitted into Google Classroom. Am I able to seamlessly use Apple Pencil to write on their Google Doc, expect it to save, and allow them to view their work? If not, how would I be able to do so?

I'm thinking along the lines of providing written feedback on papers through the iPad Pro.

Any insight?