Go Locker Pink Mustache Theme. Designed specifically for Go Launcher EX. Pink Mustache Lockscreen for your smartphone! Celebrate Movember with this cute pink mustache! App Care: 1. Install Go Launcher EX v2. 58 or above and Go Locker v1. 0. 2. To select Pink Mustache — Click on "Menu". Theme Settings. 3. Select "Locker" at the top.