Gregory is from the Skedans clan and his Haida name is K’aajuu G’aaya which means “Good Singer". Gregory began creating art in 1984 and was later introduced to carving in 1999. Gregory learned jewellery engraving from artists Norman Bentley and Jim Edenshaw. In addition, he has received guidance from Guujaaw, Gwaai Edenshaw, Ding Hutchingson, Robert Cross, Nelson Cross, Wayne Wilson, Clarence Mills, Jim Hart, Pat Wesley, Bill Bellis, and Jesse Sarber. Aside from jewellery, Gregory is also a musician and guitar-maker. He attended the American School Of Luthier in California to study guitar building and master inlaying with Larry Robinson. Gregory is the older brother of Dion Williams and Ryan Williams. All three brothers specialize in engraved jewellery with inlay work, and Gregory has enjoyed teching his siblings about Haida design and carving technique.