It is GO-Locker Theme which requires GOLauncher and GO-Locker applications installed.
To enable the GO Locker Theme do the following steps: - Download and install GOLauncher and GO-Locker from the Google Play. - Download and install our GO-Locker Theme. - Start GO-Locker. - Sweep the screen from right to left or simply tap on "Installed" to see the themes available on your device. - Choose our Theme tapping on the Theme icon. - Tap the "Apply" button to enable the Theme
It is useful to watch youtube video about the Theme.