Alli starred in the Three Lions' 3-2 win against Germany on Saturday and currently leads the England Twitter feed's man of the match poll with 42 per cent of the votes.
It's a tough one, but who was your #England man of the match in Berlin?— England (@england) 27 March 2016
The midfielder's performance evoked comparisons with former captain Bryan Robson for many, and manager Roy Hodgson acknowledged, albeit tentatively via Sky Sports, that Alli does have the ability to reach that level.
Gray, who won three caps for his country, concurs.
"The things Alli was doing were way beyond his years - his brain, the runs he was making," said the former Sunderland man on TalkSPORT's Colin Murray Show on Monday.
"You talk about something that we've been waiting for in a England shirt - that was it in a heartbeat.
"Every single thing that he touched it was just gold dust - the moves he made, the drag-back that he did when he had four players around him.
"He just grabbed the bull by the horns and said: look, I want to play in this starting eleven."
Alli has shone for Tottenham in what is his first season in the top two tiers of English football, and his combined goals and assists tally (16) is more than any other midfielder eligible to play for the Three Lions.
The former Milton Keynes Dons midfielder has made a similarly bright start to his international career, though he missed a glorious opportunity to register his second strike in five appearances at the Olympiastadion.
Fellow Spurs teammates Harry Kane and Eric Dier scored England's first and third goals in Berlin, with Leicester's Jamie Vardy equalising in between.