Greg, also known as Gekko, is one of three members of the PJ Masks and is the youngest.
Greg's daytime outfit consists of a green sweatshirt with a lizard image at the center and a pair of pants. He has light skin, green eyes, and blonde hair. The outfit of Greg's nighttime hero, Gekko, consists of a green lizard jumper and mask,
- Greg is friends with Conner and Amaya, and considers them best friends.
- Greg is the youngest of the group.
- He has a love for reptilians, especially lizards.