2. Use a root explorer (such as ES Explorer) to copy the file to /system/app
3. If the update already downloaded, delete it from /cache
*Credit for the apk goes to the CM team and or whoever creates the gapps packages!
Alternate method if you have a custom recovery *E4GT ONLY*:
1. Download the Disable.OTA.Updates.zip file and flash in CWM (this will install fotakill and clear cach for you)
*Thanks to tdunham for alternate method!