The level of "support" varies between different editors. Last version of Pinnacle that I have used was 18.5 and, even with GPU acceleration being enabled, the performance was behind the PowerDirector, because this one uses for encoding the new nvidia NVENC encoder (not the CUDA cores). I had to actually extract some components from an older nvidia driver (the driver wasn't supporting 900 series) to make my GTX 960 CUDA -based encoding work on Pinnacle 18. Newer nvidia drivers dropped the CUDA encoding support in favor of NVENC.
I am strongly suggesting though not to buy a laptop for video editing. On every forum that I go related to video editing (one of my hobbies), 80% of the complains are related to laptop issues, especially to intel-nvidia cooperation.
On a desktop you can disable the intel video when you have a dedicated video card (like a GTX960), but on a laptop the nvidia video has to "flow" trough the intel to get to the integral LCD display.