You can download the images, boot them in a VM and install all the drivers required to run them on your notebooks (like graphics card, wifi, ethernet). Of course you can also remove software you don’t need.
Then you can convert the qcow2 image to raw and dd this to the notebooks hard drive. I tested this once for the Whonix gw. You need to tweak the network settings a bit, most likely the external interface of the gateway, in a way that it successfully connects to your upstream router. If you use wifi for the external interface maybe also some firewall rules have to be changed.
You might also want to take a look at this thread: Whonix-Gateway in WLAN - #12 by Patrick
When you run the gw on bare metal and the ws in a VM you can either attach the network interface to the VM (easiest) or use NAT from the host. The latter one maybe breaks stream isolation (not sure about that).