The contest will take place in Spurs' new stadium next week.
Accompanying a 'Tottenham Hotspur: One Family' picture on Twitter, Gascoigne said: "Wow just had to add this as my time at Spurs was family.
"I'm sorry, just a bit too excited to be playing. I loved the club, even the car park was beautiful, down to the tea lady.
"It'll be an honour to wear the number eight again. See you next week. Come on you Spurs. Huge hugs from Gazza."