The 24-year-old joined up with Gareth Southgate's squad at the end of last week ahead of a double-header against Scotland and France.
It's the second time Gibson has been named in the full England squad - he was an unused substitute for the game against Lithuania in March - and the proud Teessider has wasted little time in settling in alongside some illustrious company.
"I'm loving it," he said. "It's a test training with the best players in the country every day, but that's what you want, and I've enjoyed testing myself.
"The lads couldn't have made me any more welcome and been any more helpful than they have, and there's a really good spirit among the squad.
"It's good for confidence and it's been a great experience so far - it's something that I want more of."
That 'great experience' included spending 48 hours with the Royal Marines in Devon where training kit was swapped for military training uniforms and the St George's Park bedrooms were swapped for a night sleeping under the stars.
England manager and former Boro skipper Gareth Southgate led the way in the activities and said; "We wanted to expose the guys to an elite environment with one of the elite forces in the world."
"It was an unbelievable experience and was really, really tough," said Gibson. "Things like that are what shape you in life. There's no phones, no comforts, and everything is stripped back. It was really good."
Saturday will see England step out at Hampden Park for a Russia 2018 World Cup Qualifier against Scotland. Victory will take Southgate's men a step closer to securing a spot at next summer's showpiece while defeat would all-but end Scotland's hopes once again.
"It's a massive game for us both," said Gibson. "It's an historic fixture with a good rivalry. I'm sure it will be fiercely competitive and played at a fast tempo, but we'll be ready to take on the challenge and will hopefully do the business."
There's plenty of fierce competition for places among the England squad and Gibson is battling with the likes of John Stones, Gary Cahill, and Chris Smalling for the central defensive positions.
But with a friendly against France on Tuesday following the Scotland game, it's likely that every member of Southgate's squad will be handed an opportunity, and when that comes it will represent a full England cap for Gibson.
"I've always said it would be a dream," he added. "It'd be great to get that opportunity in one of the games and if I do, then I hope I can take that chance."