Bale has been linked with United since the end of last season - and Giggs says he'd be happy to see such a deal happen.
He told the South China Post: "I'd be a happy United fan, that's for sure.
"I think he's a Man United player. I think the fans would love him.
"The fans would adore him but again, like I say, he's at a club where he's won three Champions Leagues so why would you leave?"