In the afterword of the GoShogun: The Time Étranger novel, original creator and screenwriter Takeshi Shudo with provides us insight into the public reception of GoShogun as well as his own ideas on what GoShogun is supposed to be about.
On October 29th 2010 at 4:03 AM (JST), precisely 7 years ago, it was announced that Takeshi Shudo had passed away. He was the screenwriter of franchises such as GoShogun, Minky Momo, and some obscure little thing called Pokémon among others. A remembrance event was held at the Shin Bungeiza movie theater in Ikebukuro on June 25th 2011. This is a translation of a fan's write-up of this event.
If you have not yet watched Goshogun: The Time Étranger, close this window and go watch the movie before reading this. You are doing yourself a massive disservice otherwise.
However, to this day there still isn't a single script I've written since that matches the especially unrestricted one I wrote for "The Time Étranger" of "Sengoku Majin GoShogun".