As we know that passed GIB E intent to bid 2♣ is very in danger!
How to defense over 1nt with passed hand?
I think here GIB need to be improved on GIB CC :
1-X=long ♣ suit,ask pd to transfer to 2♣,then pass.
2-when forced to 2♣,rebid 2♦ will show red two suited.