Wow she already have a lot of white hair! Indeed looks like it's very fast as they promise, awesome!
I'm growing Gorilla Punch too, pre flowers are just beginning here π
Good luck bro!
What a nice progress!
She looks awesome. I dont think you need defoliation at this stage.
The yellow seems like early signs of lack of Nitrogen.
Im sure, that more experienced growers will give an advise.
Best of luck