"It has all be a bit of a whirlwind," he told the BBC. "I had just got my boarding passes printed for a short trip to Majorca with my girlfriend when I got the call on Friday lunchtime.
"The trip had to be put on hold and I couldn't get down here (Wembley) quickly enough."
Gibson was an unused substitute as England's defence, largely untroubled, got through the game unscathed. But far from disappointed, the young man who has proudly captained his club on occasion this season, simply said: "It is an honour to be involved.
"To be called up to represent your country, to be a part of it, is such a proud moment, not just for me but for my family who who everywhere with me.
"It's something you dream of growing up and it was a privilege to be there."
Speaking of Gibson's call-up, Southgate, former Boro skipper and manager said: "I have considered picking him before, he's a player we have worked with at U21 level so we know him well, we know his personality and character.
"He's already the captain at his club, a Premier League captain at a very young age, which tells you something about his leadership qualities."