打開終端輸入：
gsettings set org.gnome.gedit.preferences.encodings auto-detected"['GB18030', 'GB2312', 'GBK', 'UTF-8', 'BIG5', 'CURRENT','UTF-16']"
gsettings set org.gnome.gedit.preferences.encodings shown-in-menu"['GB18030', 'GB2312', 'GBK', 'UTF-8', 'BIG5', 'CURRENT','UTF-16']"