Package: org. opengapps. app Download APK Open GApps launches its own app for quick and easy Google Apps package downloads. APK files are meant to be used by the Android OS to install an application. APK files are basically just a wrapper around an app, you can also open one in a program like WinRAR or some other unzipping/decompression. The official onlinecas.win app that enables you to quickly check for the latest Open GApps packages and download them from onlinecas.win Permissions.