So I just went and read every bottle/box I have from them because that sounded crazy.
And ya man you are misinterpreting something. Also, There isn't just 1 GO bottle, so maybe you are looking at something I don't have which would be odd cause I own the entire line and a few others. No where does it say to not pH, the actual starter GO box has a asterisk saying use dechlorinated water and another saying pH adjusting is not necessary. But it is. Like I said I saw nothing anywhere to the effect you are saying.
I think you should grow without pH testing, make a thread and show us all what happens. I had pH issues when I did not test my feeds/flushes. but where I fail you may succeed! make a thread yo!