GNOME desktop has IBus integration by default. To set up the Zhuyin/Bopomofo (注音) input method is quite easy. On Arch-based Linux, there is an AUR package called ibus-chewing which is a Chinese Zhuyin/Bopomofo engine for IBus. The engine uses libchewing(酷音) under the hood. It's also a very popular input library in Taiwan, even on Windows systems.