There are 21 GONG characters on this checklist, across 18 figures.
The most featured are
Superman (2 figures), Astro Boy (1 figure) and Asuka (1 figure).
Astro Boy
Asuka
Bai Yuekui
Batman
Cody
Detective Conan
Evangelion Unit-01
Fujiko Mine
Gru
Kamen Rider
Kaworu
Kid The Phantom Thief
Mari
Nadeshiko Kagamihara
Rei
Rin Shima
Shazam
Shinji
Superman
Ted
Wall-E