Need help unlocking bootloader on LG Optimus G pro E980

I have looked around and can't find a method there may be one on here that I haven't found but I hope I can get some luck here :laugh: .
I have already rooted but I am looking for some help unlocking the bootloader as I have had some trouble doing so :( .
Additional info:
LG-E980
KitKat 4.4.2
If any other info is needed tell me down below :D I am new to the android community :).

P.S. Thanks ahead of time :D .