Countif problem (with formule inside)

I have a short question where I am struggling with for a while:

I have a formule with countifs:
I want to count if:

Count if the seperate values in column G minus K45 are bigger than 30.

I tried a lot of things like the option below: (I know bit stupid option)
=COUNTIF(ALL!$G:$G;"-k45"&">=30")

Hope someone can help me!

Thanks a lot