hey,
I'm running smth similar in a python script (actually is adapted from tor2json script), that takes content from several URL's and extract the IP information and builds the GDC JSON file. Script runs on the Management box and JSON file is addressed locally.
You just need to make sure you treat your sources an sanitize them, and MAKE SURE YOU KEEP THE UUID otherwise the GDC object are not refreshing properly 😊 .
Thank you,
PS: can you offer a link for "Custom Intelligence Feeds" you as an example so I can look a bit over.