Coleman reckons his superstar would not be out of place if he did land a move to one of the European giants.
He said: "Gareth's a quiet lad. You would never think he is one of the most dangerous left-sided attacker on the planet, but he is.
"And he wouldn't be fazed by moving. He loves playing football, that's when he smiles. He has the character to handle that.
"It's not easy moving to another country, another culture. It's a tough ask. But he's young and has it all in front of him.
"He's a totally level-headed lad who is completely unaffected by it all so there are no concerns about getting big-headed."