Gordon has struggled with the persistent injury and managed to play only one game for Sunderland last season before being released in the summer.
He is still without a club and recently has been coaching at Irn-Bru First Division side Dumbarton, but the former Scotland international insists he has not called time on his career.
"People can say what they like to say but I'll continue to try and rehabilitate my knee and get myself in the best possible state," he said.
"If that means I can get back to playing football then I'd be delighted.
"I've been round people in Europe and back home getting as many opinions as possible to find the one thing that will help."