It will notify you, before making any changes, if it finds any problems

The installer checks your device’s capabilities, like the system partition size.

Most ROMs support this (addon.d) function

Automatic backup: It is not necessary to re-flash Google Apps when you flash a ROM update.

Strong compression, allowing for relatively small downloads of even the most complete packages.

Frequently updated Google Apps: The pre-built packages are updated every (European) night (if there are any updated Google Apps available).

DPI-optimized support for all Google packages (unlike other GApps).

All platforms and all Android versions are supported.

Some highlights about the characteristics of the Open GApps packages: On you can find more information about the project effort and also pre-built Google Apps packages generated by the buildbot.

The Open GApps Project is an open-source effort to script the automatic generation of up-to-date Google Apps packages.

The GitHub issues tracker is only used for issues concerning The Open GApps Project compiler-scripts themselves. Please don’t file directly any GitHub issues for The Open GApps Project if you experience problems with the pre-built packages. Remember to include at minimum the Open GApps installer debug log and if applicable a logcat. If you’ve found a bug in the pre-built packages you can report it at the XDA Open GApps Development Thread. Don’t forget to add at least the Open GApps installer debug log and if experiencing Force Closures also include a logcat. If you can’t find the answer to your question use the XDA Q&A Thread or join us on Gitter to receive support. If you have any questions check out the Open GApps Wiki, especially the FAQ answers most questions. The Open GApps changelog is aggregated on the Open GApps Twitter feed. Add the /opengapps/ URL to your download-manager, not the Amazon S3 URL, to support continuable downloads. If your downloads are interrupted you can try to use a download manager until your ISP or GitHub/Amazon finds a solution to improve connectivity to your region. If you experience slow downloads it is caused by limited connectivity from your ISP to US East. GitHub’s releases are hosted on Amazon’s S3 US-East servers. The releases are all hosted using GitHub’s releases functionality. XDA Forum Open GApps Development Thread.A list of the various support channels available for the packages:

Google Installer Mi Pad