GNU GuixSD focuses on respecting the user’s computing freedom. It builds around the kernel Linux-libre, which means that only hardware for which free software drivers and firmware exist is supported. Nowadays, a wide range of off-the-shelf hardware is supported on GNU/Linux-libre—from keyboards to graphics cards to scanners and Ethernet controllers. Unfortunately, there are still areas where hardware vendors deny users control over their own computing, and such hardware is not supported on GuixSD.
One of the main areas where free drivers or firmware are lacking is WiFi
devices. WiFi devices known to work include those using Atheros chips
(AR9271 and AR7010), which corresponds to the
driver, and those using Broadcom/AirForce chips (BCM43xx with
Wireless-Core Revision 5), which corresponds to the
Linux-libre driver. Free firmware exists for both and is available
out-of-the-box on GuixSD, as part of %base-firmware
The Free Software Foundation runs Respects Your Freedom (RYF), a certification program for hardware products that respect your freedom and your privacy and ensure that you have control over your device. We encourage you to check the list of RYF-certified devices.
Another useful resource is the H-Node web site. It contains a catalog of hardware devices with information about their support in GNU/Linux.