Graeme last pulled on a Scotland jersey against South Africa in the 2004 Autumn Tests, and it's been a long road back to the international scene.
Speaking to glasgowwarriors.org, Graeme said: “It’s been difficult. I joke about it a lot with Muffles (Andrew Henderson). He calls his year out of the national squad as his ‘year in the wilderness’ whereas I call it my ‘four years in the wilderness!’
“It’s important to stay positive though because I have been in and out of the Scotland squad quite a lot. You just need to keep plugging away.
“It’s been difficult with Glasgow because I haven’t had as much game-time because of the level of competition for places. Muffles and Daryl (Gibson) have created a pretty formidable centre partnership there. But when I have come on, I feel like I’ve played to my ability.”
A try in the Scotland A team's 37-15 victory over Italy in Rome was also a timely reminder to Scotland coach Frank Hadden.
“International ‘A’ team rugby is definitely a step up from club rugby and it doesn’t have all the added pressures of full international rugby. You’re not in such a fishbowl environment so you can let your hair down a bit more on the field.
“The way the Scotland A team played last weekend really suited my game because we threw the ball around quite a lot.
“I just can’t wait to go down to Cardiff and take in the experience at the Millennium Stadium. It’s an awesome place to go and watch for supporters so you can imagine how good the atmosphere is for the players.”