Definitely. Kingsman originated from a comic. The comic provided the framework and characters that were adapted for the big screen, while also allowing for some creative expansions and changes to suit the cinematic format.
Kingsman 3 is purely fictional. The story and events are crafted by the writers' imagination. There's no real-life basis for it. The action, adventure, and spy elements are all made up for entertainment.
I'm not sure exactly, but you might be able to find that information on the official Kingsman comic publisher's website or some dedicated comic databases.