Question Would it be possible to somehow modify (hack) a regular graphic card to monitor all the user's screen activity?

[Indiana1]

To basically spy on someone this way without their knowledge? If so, how difficult would it be to make it work? Could a "not much experienced person" do it at home?

 

[USAFRet]

To basically spy on someone this way without their knowledge? If so, how difficult would it be to make it work? Could a "not much experienced person" do it at home?

No.

And even if there were, this is not the place to ask about "spy on someone this way without their knowledge ".