How to restore GBWA backup on new phone to GBWA app
if you do the following it must work:

go to gbwhatsapp on your old phone choose GB Settings 
--> other MODS
-->6.7 Backup data (i do for secority reasons also the following, go to gbwhatsapp--> settings--> chats-- make backup) 
then transfer the    whole GBWHatsapp map to sdcard, and take it out of your old phone.
install GBWhatsapp on your new phone and DONT OPEN IT YET
now put in your sdcard with the backup of GBWHatsapp in your new phone
--> copy GBWhatsapp map to internal memory
--> then open GBwhastapp and choose for restore