Desktop Environment Integration
This tutorial shows how to integrate GNUstep apps into your desktop environment easily. You could use any desktop environment that provides a global menu. But as I recommend KDevelop as an IDE for developing GNUstep apps, we are going to use Manjaro Plasma/KDE in this example.
When you're presented with the Manjaro Desktop, add a panel at the top of the screen. It should have 26px of height. You may add KDE widgets as you like. Be sure to add a "Global Menu" widget at the left and a spacer between the menu and supplementary widgets.
You might want to remove, modify and/or hide the panel at the bottom. If you then use an KDE app, it will look like this:
Then fire up SystemPreferences.app (installed with the basic gnustep-ngr-desktop installation) and choose "SombreManjaro" as your GNUstep theme (click "Apply" and "Save"):
SystemPreferences.app is going to look like this (might need a restart though):
This setting will apply for all GNUstep apps. This way you achieved an optical integration of GNUstep's horizontal menu in a top panel. This works well, but has the drawback that it will invisibly cover the KDE widgets which are not clickable as long as a GNUstep app is active.
DBus menu integration
One day you might be able to use the DBus menu integration of GNUstep (this is currently unfinished/buggy). I'll already show you how to use it.
Open the "Defaults" panel of SystemPreferences.app and change
You will not get a Windows 95 style, but an integration of the GNUstep menu into the DBus Global Menu widget from Plasma. If you restart the app it will look like this:
This way all your KDE/Plasma widgets continue to work, but there are some bugs with GNUstep apps currently.
You might want to adjust font/sizes and the modifier keys you want to use. You can do so easily using SystemPreferences.app.
After this you might want to proceed with setting up your Integrated Development Environment.