Gregory Mackay has been making comics since school. He enjoys drawing and watercolour painting. He likes drawing aeroplanes and machines, as well as building models and painting pictures.

Both Anders and the Comet and Anders and the Volcano, his first books for children, have also been published in France, and have been shortlisted for the Angouleme Festival, the most prestigious comics awards in Europe, acknowledging the best comics published across the world.

Anders and the Comet was also the winner of Australia's Silver Ledger Award, and in 2018 Gregory undertook a six-month Australia Council for the Arts residency at the Keesing Studio at the Cite Internationale des Arts in Paris.