What's Your Problem! May 03, 2016 View fullsize gcp new website launch Let us solve your problem: Free Solution Workshop Sessions in May 2016.Click here to find out more. “gcp’s knowledge, advice and problem-solving processes have been key in supporting Knightstone’s drive to develop high quality, affordable and sustainable low energy buildings that aid the mitigation of fuel poverty and reduce lifecycle maintenance.” — Parry Morgan, Senior Contract Services Manager, Knightstone Housing