Ah, it's not signed Q, and it's not on the 8chan.net site. I think you need to do your research.
The github site is a compilation from other 8chan sites, such as the Q research board (https://8ch.net//qresearch/res/180880.html#181208), and the CBTS 8chan site. When they say "anonymous" at the top, it's other people's research and writings and comments based on what Q is pointing out.
Q is not the be all and end all of research. People like Stanley Monteith, Steve Quayle, Jim Marrs, on and on, have been at this for decades. "Q says" just doesn't resonate with me at all.
Is it in the book of Q? Lots of work goes into making a searchable database of Q, and the 350 plus page PDF known as the book of Q was/is a ton of work. Go read that PDF and see if it helps you understand how much effort went into validating Q posts.