The Minstermen take on Harrogate Town at Bootham Crescent with both sides looking for promotion this season.
"It is the biggest game and I am looking forward to it so much," Gray told BBC Radio York.
"They have been in the top three all season, they deserve a lot of credit, it is a derby, form goes out of the window, it will be a battle.
"It is all about the crowd, Harrogate will be well supported but it is important that we give our fans who come from far and wide the win."
Gray says the preparations are in place for both teams, who know the importance of the game.
"I have seen them play twice in recent weeks, we have done a lot of work on them and they have on us."
Photo by Ian Parker