Mines not a gtd, but a mk5 GT TDI...but I'm thinking the same principle on it,
I work 30miles away from home, the main (fast) road I take is 45sec approx from driveway to main drag, I never leave it to warm up, I just go go go lol..I just take it steady until it get up to temp, don't rag it in all gears until warm, change gear around 2000-2500 rpm, it takes around 8-10mins before the temp gauge is on 90,
It has 136200 miles on it, I've had it since March 2010, at 74540..the 'chocolate' turbo is whining but it's still as responsive as day one(VW Technicians words not mine lol)
Yours sounds normal pal, keep the revs now as much as you can until its up to temperature and it'll be fine