Anything since 3.0-176 can pick up the windows default sound input and use it to emulate a GC mic. Just use the latest git build.
OS: Windows 10 64 bit Professional
CPU: AMD Ryzen 5900X
RAM: 48GB
GPU: Radeon 7800 XT
CPU: AMD Ryzen 5900X
RAM: 48GB
GPU: Radeon 7800 XT