i have both the halfords one and the proper vw one, its doable with the halfords one especially as you don't have rear drive shafts on your gti's, however its easier with the vw one no matter what mk5 golf you own.
good luck undoing them if your only on axle stands as the hight needed to get the purchase on the breaker bar can be a problem with the ridiculous tightness vw do these up, plus throw in a bit of rust and corrosion and you'll be needing a swear jar pretty soon