How do I locate an object using :GetFullName()?

Let's say I have an Object in a random model in the Workspace, and I used :GetFullName() on that object and got this in the output: Workspace.Model.TestObj. How would I locate the object using that string, without having to use loadstring?

EDIT: I provided my attempt

print(game[game.Workspace.Model.TestObj:GetFullName()])
--It just gives me an error that says "Workspace.Model.TestObj is not a valid member of DataModel"