Hello,

I was wondering if gmusicbrowser will play anything that's capable in the gstreamer library?

Thanks.

no, gmb is a library-based player, so it will ignore formats for which it it doesn't know how to read/write the tags. For various reasons gmb doesn't use gstreamer for reading/writing tags but instead uses its own libraries which currently support most common formats except wma (planned) and wav (not planned)

On the other hand, it can add files that are not supported by your installed gstreamer plugins, so you may need to install some plugins to play them. Note that currently gmb uses only gstreamer-0.10 and not gstreamer-1 so you need to install 0.10 plugins.