Download 20130812 package for android 4.2.2 (gapps-jb-20130812-signed.zip),
unpack the zip, cd to system/app/ , copy the GmsCore.apk and NetworkLocation.apk to your phone's /system/app/ ,
then reboot your phone.
You can copy other *.apk to /system/app/ if you like.
XDA Developers was founded by developers, for developers. It is now a valuable resource for people who want to make the most of their mobile devices, from customizing the look and feel to adding new functionality. Are you a developer?