How to unlock bootloader g6000

[jadoon_jadoon]

Assalamu alaikum marhaba team please give me any solution how to unlock bootloader on7 for instaling google play store.
i install crom service apk but no luck please any body help me.

 

[thoiapple923]

Level Security 2 Error, Can Not Unlock Crom, Install GApps Via EFT