Gtk was imported without specifying a version first.

몇몇 설치에 성공한 내용이 보이네요. 그것을 참고해봐야 할거 같습니다.
사용하시는 OS기종을 알려주셔야 확인하기 편합니다. 아시겠지만요. ㅇ_ㅇ;; 알수없는 버그는 상당한 부담을 줍니다.

1. 설치에 성공한 내용을 해본다.
2. 오류를 검색해 본다.

ibus-setup
yum
rpm
update
bug fix
localectl

이걸로 검색
PyGIWarning: Gtk was imported without specifying a version first. Use gi.require_version('Gtk', '3.0') before import to ensure that the right version gets loaded.
from gi.repository import Gtk

이런 답변이 있네요.
import gi
gi.require_version("Gtk", "3.0")
from gi.repository import Gtk

Nabi를 버리고 IBus를 설치하다!
http://lowid.tistory.com/518

우분투 14.04, iBus 한글 입력 버그 / Nabi(나비) 문제 / Fcitx 문제. 우분투/리눅스
http://nemonein.egloos.com/5229235

xfce Hangul input method, cygwin 설치 따라하기 3/3 - 한글 입력기 편
http://m.blog.naver.com/aaiaia/220701095279

Tired of IBus keyboard settings
http://elementaryos.stackexchange.com/questions/7698/tired-of-ibus-keyboard-settings

Use gi.require_version('Gtk', '3.0') before import
http://mednis.info/use-girequire_versiongtk-30-before-import.html

電腦領域 HKEPC Hardware ≫ Linux玩家 ≫ Gentoo 的 ibus-cangjie 是否 broken 了
http://www.hkepc.com/forum/viewthread.php?fid=24&tid=2345162

06.(ibus-setup-quick:3739): GLib-GIO-ERROR **: Settings schema 'org.cangjians.ibus.quick' is not installed

[Ubuntu 한글 입력기 설치] iBus-hangul 설치하기
http://ledgku.tistory.com/24

우분투 14.04, 'ibus' 로 한영전환.
http://egloos.zum.com/nemonein/v/5233543

RPM 설치/확인/제거
http://zetawiki.com/wiki/%EB%A6%AC%EB%88%85%EC%8A%A4_rpm_%EC%82%AC%EC%9A%A9%EB%B2%95

ibus-setup-1.5.3-13.el7 RPM for noarch
From CentOS 7.2.1511 for x86_64 / Packages
https://rpmfind.net/linux/RPM/centos/7.2.1511/x86_64/Packages/ibus-setup-1.5.3-13.el7.noarch.html

ibus-setup rpm build for : CentOS 7. For other distributions click ibus-setup.
http://rpm.pbone.net/index.php3/stat/4/idpl/31979325/dir/centos_7/com/ibus-setup-1.5.3-13.el7.noarch.rpm.html

ibus-setup rpm build for : Fedora Other.
http://rpm.pbone.net/index.php3/stat/4/idpl/34684281/dir/fedora_other/com/ibus-setup-1.5.14-1.fc25.noarch.rpm.html

ibus/ibus
Install
https://github.com/ibus/ibus/wiki/Install

ibus: Intelligent Input Bus for Linux / Unix OS
https://www.openmamba.org/distribution/distromatic.html?tag=devel&pkg=ibus.x86_64

ibus bug fix update
https://rhn.redhat.com/errata/RHBA-2015-1116.html

How do I apply package updates to my RHEL system?
https://access.redhat.com/articles/11258

ibus-gtk-1.3.4-3.el6 RPM for x86_64
http://www.rpm-find.net/linux/RPM/ftp.scientificlinux.org/linux/scientific/6.0/x86_64/os/Packages/ibus-gtk-1.3.4-3.el6.x86_64.html

yum ibus-setup

ibus/ibus
CentOS
https://github.com/ibus/ibus/wiki/CentOS

Customize shortcut keys for IBus 1.5
https://desktopi18n.wordpress.com/2012/05/28/customize-shortcut-keys-for-ibus-1-5/

VirtualBoxのゲストにCentOS 7.2 (1511) をminimal install
http://qiita.com/msakamoto_sf/items/bf2e37b22ae6694440c3

CentOS 7
http://optic.tistory.com/241

Install CentOS7 and setup MIPS QEMU
https://xinolinx.github.io/002-MIPS_QEMU/

CentOS 6.2英語環境で日本語入力(IBus-Anthy)CommentsAdd Star
http://d.hatena.ne.jp/m0t0m0t0/20120205/1328441799

Integrate IBUS or Fcitx seamlessly to KDE
https://forum.kde.org/viewtopic.php?f=226&t=122114