Try to look at Youtube for the info: https://www.youtube.com/results?search_query=Neuroflight
Also refer to the GitHub: https://github.com/wil3/neuroflight
Neuroflight creator has also a dedicated webpage for Neuroflight: https://wfk.io/neuroflight/

i want to test neuroflight but there is no documentation how to build the hex
file with gymfc. (no way) i am a programmer and normaly able to programm
hex files…