My little bit of knowledge is in Japanese, not Chinese, but maybe this will help. There is also ibus for Asian language which some people prefer. If you're using GhostBSD and Gnome, ibus may be the better choice. I know that a few Linux distributions that prefer Gnome use ibus by default.
I began using fcitx because ibus started becoming a nuisance for me around FreeBSD-9 or 10. But, I don't use Gnome. It became a nuisance because I had to start running a little script to change from Japanese to English, rather than just hitting a key combination.
You *might* be able to find more information on fcitx in Chinese--I remember when I was doing web searches on it, most of what I found was in Chinese.
I'm not sure if any of this is useful, but for Japanese, at least, fcitx is pretty easy to use, but I have no experience of ibus with Gnome. Either one will work I think, I'm just not sure which is more work with Gnome. For what it's worth, I have a page on Japanese in Linux and some BSDs, the Ubuntu section has some stuff about using fcitx with Gnome.
https://srobb.net/jpninpt.html