Rangers 'fought off' by English minnows for midfield signing
That's according to the club's official website.
The former St Johnstone and St Mirren loanee was one of the raft of players released by Manchester United this month.
It was reported that Rangers were keen on signing him.
A point reiterated by Gillingham as they announced the signing of Willock on a two-year-deal.
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Hide AdThe statement read: "The club fended off interest from many teams, including Scottish giants Glasgow Rangers, to sign the heavily rated United youngster who arrives with strong references, including from former United legend Nicky Butt."
The 22-year-old made a total of 26 appearances in Scottish football, his latter loan with the Buddies lasting just half a season.