It was Peter Gotti who gave the order to track down Gravano, and Gravano gave up his cover cause he wasnt in the program anywhere and had a business out in the open in Arizona and did an interview with Barbara Walters taunting his old LCN mates to try and get him.
I think Gravano was out in the open, operating a swimming pool construction business in Arizona. Wouldn't have been too difficult to find him.