CyanogenMod 10.1 Android 4.2.1 – 4.2.2 Google Apps for Jelly Bean 4.2.1 - 4.2.2: These are the Gapps packages that are compatible with Android 4.2.1 & 4.2.2 Jelly Bean. If you ever install a Cyanogenmod custom ROM or any other custom ROM for that matter, you'd notice that these applications are missing. This is because they are licensed apps and as such the developers of these ROMs cannot include them in their custom ROMs. You must install Cyanogenmod Gapps on your own if you want to use the Google applications. Please note that these apps are not necessary for the booting or running of the custom ROM. You can see a full list of CyanogenMod Gapps packages here.
You are downloading GApps (Google Apps) for installing Play Store on your Android device with a custom ROM. If you do not install Gapps, you will not have Play Store for AOSP ROMs like CM10.1. These Gapps packages are compatible with Android 4.2.1 & 4.2.2 Jelly Bean.
How do I install CyangenMod 10.1 Gapps? So, you've downloaded the Gapps and want to install them on one of your Android smartphones, here's what you need to do:
You will need to install the Google Applications packages via your device's recovery. These steps vary from device to device, but the general process is the same as that used to install CyanogenMod, or any other flashable zip:
Copy the gapps .zip-file to your /sdcard/
Using adb: adb push filename.zip /sdcard/
Reboot your device to recovery via any one of these methods: 1) using the power-on key combo for your device; 2) running adb reboot recovery from your computer.
Choose "install zip" or "Apply update" from within recovery, and navigate to the zip-file loaded earlier.
Reboot from recovery back to Android.
Google Apps packages are hardly ever supported by the CyanogenMod team, or by their distributors. The good thing is that there isn't much that can go wrong when installing Gapps. If you are experiencing problems, here is a list of different things you can try (each one a bit more extreme/destructive than the last):
Reboot your device
Verify all apps are up-to-date in the Play Store
Re-flash the Gapps package (via recovery)
Wipe the /system partition and reinstall both CyanogenMod and Gapps (as long as if you don't wipe /data, your data will be preserved)
Wipe /system, /data and /cache and reinstall both CyanogenMod and Gapps (this will delete all of your data, i.e. like you're starting from a clean slate)
If you still have problems consider googling for alternative Google Apps installation package. Thanks for reading, everything you need to know about Cyanogenmod 10.1 Gapps - Google Apps Downloads/Installation for Android 4.2.1/4.2.2 Jelly Bean.