Robson, now 68, took over at St James' Park in September 1999.
England manager between 1982-1990, Robson kicked-off his managerial career at Fulham before taking Ipswich Town to FA Cup and UEFA Cup honours and runners-up spot in the championship.
He managed Sporting Lisbon, FC Porto, Barcelona and PSV Eindhoven before returning 'home' to Newcastle.
Glenn said: "He's got that love of the game. He enthuses it.
"When you watch him on the television he's still got that and that's what's maintaining him. That's why he's still in it. It's like a drug to him.
"Good luck to him. He's a well respected manager in this country, he's done great for his country, he's been abroad and expanded his mind with how people work in Barcelona, PSV, Portugal.
"He is very experienced and I've the highest respect for him. It's great to see him still in football."
Glenn Hoddle will cross swords with his former England boss Bobby Robson at Newcastle on Sunday admitting: "It's great to see him still in football."