He is best known for co-creating Panday with Carlo J. Caparas and Marvel Comics' Star-Lord[2] and Skull the Slayer.
[2] Gan studied architecture at the Mapúa Institute of Technology[4] and later worked as an artist in the Komiks industry.
[2] In 1974, Gan began drawing for Marvel Comics and contributed to their line of black-and-white magazines including Savage Tales[5] and Dracula Lives.
[7] After leaving the comics industry, he became a layout designer and storyboard artist in the animation field.
[4] Upon the release of the Guardians of the Galaxy film in 2014, Gan was given both a credit in the movie and royalties for co-creating Star-Lord.