I flashed this rom ended up gmail, gmap, play store and Google search not working. After installed google installer from mi market, map and gmail is working now. But play store and google search still no hope. Worse was all my purchased applications facing license verification error.
Today, by installing stock Google installer came with phone, installed all the google applications, finally gmail, map, facebook, google drive and play store all worked beautifully for me. Cheer!
this was original China stock rom. you can fellow this thread to root it: http://xiaomi.eu/community/index.php?threads/24555/
you also facing play store, gmaps, gmail not working. the solution run google installer downloaded from mimarket to install those google application. After reboot and it will worked for you and enjoy.