If you need it as a (e.g., featuring another artist), please clarify what should be featured — for example: GGW (feat. Artist Name) - Girl Power Vol.12

If you meant (capitalization): GGW - Girls Gone Wild - Girl Power Vol. 12 (adding a space before the volume number for typical English formatting).

The proper feature format for depends on the context (e.g., a music tag, a database entry, or a filename).