Gayle has signed a five - year contract that will keep him at St James ' Park until 2021 .
Gayle was playing non-league football on loan at Bishop 's Stortford as recently as 2012 .
Gayle , who was playing non-league football on loan at Bishop 's Stortford as recently as 2012 , has signed a five - year contract that will keep him at St James ' Park until 2021 .