To be fair gmail flags basically any code, if it's zipped i've found it only needs to vaguely resemble code. basically gmail is only safe for sending image formats and document formats that it knows of and don't contain macros, then it's just a crapshoot that you don't get matched a false positive. Gmail is far from developer friendly anymore.
You can't even send encrypted 7zip archives through Gmail. Well, you can, but they'll block the download claiming it's not safe.
If you are open to arguments, there are many good reasons to take a negative stance towards Intel.
Fun fact: I sent an overview of unknown instructions in compressed text form to a gmail address, and Google rejected it citing potentially malicious content.