WineDB has it marked as silver.
Honestly, for a modern PC I can’t imagine Winamp is all that taxing of a program to run. I think the biggest bugbear will be its fairly tight integration with the Windows shell for file management and enqueuing things from an Explorer window, and maybe the external device integrations which would rely heavily on the Windows API and possibly WDM.
The video player in Winamp is also completely non-functional in Wine the last time I tried it, as it relies on DirectShow in Windows which has very iffy Wine support. That may also be why it’s marked as silver.
It’s too bad as I really liked using Winamp as a video player in Windows, despite it’s quirks.