Use Github private repository for plugin manager

[FlorianPircher]

Use can also place the .plist file in the Google Drive folder, if you want. See:

Using Private and Local Plugin Repositories

Yes, Glyphs recognizes local package indices (and also local url fields). In preferences, specify the file path (no file://…): /Users/Florian/packages.plist The value of the url fields must be prefixed by file://, but local package indices can also point to non-local repositories.