This is a feature request.
There should be a method of Settings to include a gradle project based on its path. This would allow easy configuration of multi-project builds where there the projects are not all residing in the same folder. In that case you could have a settings.gradle containing (eg. " includePath ‘…/…/RandomFolder/ProjectB’ ".
I agree that having a conventional gradle folder structure for multi-project builds is a good thing, but in my case it is not really possible. I am reading 2 different projects from 2 different git repository (I wish the project owner would merge the repositories) and trying to put one as a dependency of the other.