GPU passthrough with only one monitor, it's possible?

I like to do GPU passthrough on my gaming laptop.
It’s has intel HD and Nvidia GPU
I just reading the docs ( Contents/ at master · Qubes-Community/Contents · GitHub ) and it’s said that I need a dedicated monitor for gaming.
Unfortunately, I don’t have second monitor and I don’t want to, since mobility to use my laptop anywhere is one of my concern. It’s sickening to bring and setup external monitor everywhere I using the laptop at public places such as airport or while on journey.
So, any solution to make GPU passthrough works with only one monitor ? Thanks in advance.

It’s not likely to work with your laptop, the internal graphics and GPU is often linked on the hardware level.

Typically, laptops are not designed with two isolated graphics adapters, they are not designed to be used at the same time.