How to keep track of the plane's route on the GPS?

I want to keep the track of my plane’s route on the GPS map.
How can i do that?
Thank you for your advices

Do you mean like seeing breadcrumbs on the VFR map?

Yes, the way i have passed on the map (key “v” to view this map)

I don’t believe there’s a way to do this in-game.

There are however several apps that you can run that will hook into the game and do this for you.

For example, FltPlan is a good free one. Instructions on how to connect to FS2020.