While not as dramatic a pulp character as Doc Savage or the Shadow, his stories were often outlandish, with many supernatural or science fiction elements.
His adventures entailed fighting against the lethal super technology that was constantly created by the Kaiser's mad scientists.
Reoccurring villains included Herr Doktor Krueger, the Steel Mask, and Grun.
A character based on G-8 made two appearances in the comic book Planetary alongside many other pulp analogues as part of a society for the betterment of humankind.
Adventure House recently started a reprint series of G-8 in similar size to the original pulps, including covers and interior artwork.