Defiance
It's not just entertainment stars who've been acknowledged -- there's also boards for Gregor's late mother, his two children, his dog, and even for his ex.
"I think she did a slight eye roll, but it feels good to have her there, for some closure," reflects Gregor.
"You can come out of happiness in different ways -- sometimes you need to brood and be on your own. But sometimes you need to say, "F*** it,' and make something great out of it. It's slightly defiant."
The boards are about more than just Gregor's heartache and love of skating.
A proportion of their sale -- £250 ($380) for the existing decks, £300 ($450) for a bespoke one -- will go to Skateistan, a charity providing skateboarding training, education opportunities and pure fun for kids in Afghanistan, South Africa and Cambodia.
The NGO has been in Kabul since 2007, where it has created an indoor skate park in which 550 children enjoy the sport -- and the community and confidence it brings -- in a war-torn environment not necessarily the safest for children. It focuses on activities for girls.