Do All of the Macbook Pros Have That GPU-Kernel Panic Issue?
AFAIK there have been no widespread reports of kernel panics due to GPU related issues on 2017 MacBook Pro 15", and I doubt there are any. There's always some quantity that have hardware issues, but nothing outside of the norm. According to Apple, the issues with the 2016 version were software related and patched in 10.12.2.

With that said, the norm doesn't seem to have a brilliant track record; for whatever reason, GPU failure seems to be medicore across their products. Here's a short list that I know of:


All 2011 MacBook Pros
Mid 2012 and Early 2013 15" MacBook Pros
2011 27" iMac
Late 2013 Mac Pro


That said, if any widespread issues are present, they probably won't begin to show up in wide numbers until some time this year. Widespread reports of GPU failure in the 2011 MacBook Pro didn't really garner support until 2013 with Apple doing nothing centralized until 2015.

Though, Apple (generally) is known for good support, and I wouldn't worry too much about this.