Actor Richard Loo who plays the notorious "Tokyo Joe" in this film was also in Republic's 1942 opus "Flying Tigers" as Dr. Tsing who was staff physician for the AVG.
Both "God is My Copilot" and "Flying Tigers" had major footage filmed in the same area of Southern California, Iverson's Ranch in the Thousand Oaks area, due to it's resemblance to portions of China.