Gallacher, who had to wait for the best part of two years for a first team chance, impressed when standing in for the injured Green for the last few games of the season. The Scot had been expected to leave when his contract expired and return to play in the Scottish Premier League, with a host of clubs said to be interested.
However he will now remain at Carrow Road as understudy to England man Green, who is certain to be linked with a move back to the Premiership in the summer after returning from the World Cup.