when we find a GPL-3.0 license project on github.com, The project is BBS tool, it has the theme option. If we write our own theme. do we need to make our theme (source code) for that project public available? because of source code availability of GPL-3.0.
Also that project the ability to install plugins. If we write our own plugins, do we need to follow the license compatibility of GPL, for our own plugins ? making our plugin source code public available? Thank you.