Celtic warned they could lose Newcastle keeper Forster
Goram wrote in the Scottish Sun: "Up until now he was well down the pecking order at Newcastle. He was raw and still learning his trade.
"But I would be amazed if he wasn't now considered ready to play in the English top flight.
"His thoughts on a new deal with Celtic last week were very telling.
"I think it's fair to say he sounded very cool on the subject."