Simply put, players who have the natural ability (first touch, close control, ability to beat a man, and blistering pace that Gordon has) very very very rarely also have the degree of work ethic and desire to push themselves to improve as well, can think of very few instances and invariably they are world class players the ones I can think off.
Natural ability tends to be taken a bit for granted and the attitude and desire to improve suffers a little, AG is very much a rarity in that he has both.
He's no Barkley, Greenwood, Rashfir, Martial etc far from it, the likes of De Bruyne, Vardy, Ronaldo (yeah the best ever probably) had the ability and the character to push every ounce of that talent, will Gordon ever be that good, who knows but he has the chance due to his personal make up