To a certain extent. Goodfellas takes elements from real-life criminal activities and characters but blends them with creative elements to make a compelling movie. So, it's not a completely accurate account but has roots in truth.
Sort of. Goodfellas blends elements of real-life mob stories with fictional elements for dramatic effect. While it has roots in true events, it's not a completely accurate documentary-style retelling.
Yes. Goodfellas is based on real-life events and people associated with organized crime. It weaves together various true incidents to form the plot of the film.