Turnbull, 33, was immediately announced as Gray’s replacement upon his resignation on Friday, having served under him as assistant at Craik Park.
He told the club’s official website: “Things are going well for Morpeth, why would I come in and change things?
“There will be little tweaks because I have my own ideas. The way Nicky, Dave Malone and Jon (McDonald) have done things over the years, who am I to come in and change when they have been so successful?
“If something isn’t broke, why try and fix it?
“My ambition for this season is to win one game at a time, concentrate on the first game of the season then move on to the second one. It’s a cliché but one game at a time.
“If we get things right, with the players we’ve got, we’ll be there or thereabouts in the top six. But, for me, it is one game at a time.”
Midfielder Turnbull, who counts Blyth Spartans, Gateshead and Hartlepool United amongst his former clubs, will stay registered as a player for the 2020/21 season.
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