My top gnome-panel is set to not expand and sits on the top-right of my screen. I just realized I wouldn't mind if maximized windows were able to get behind it (it wouldn't actually cover up anything). Is it possible to achieve that with the gnome-panel?
Here's what it looks like now:
Ideally, the window's titlebar would be behind the panel (partially obscured by it). I know that different dock softwares like AWN are able to do that, but I'm running a weak netbook, and I would rather do that with the gnome-panel.
I can give you a small trick to achieve what you want, it's not really elegant but it should works :
Explanation : With the Autohide feature, your application windows will expand to the edge of the screen, the 'so big' delay will let your panel visible
The functionality you're going for is what the app called WingPanel was developed for. You can install it from a PPA by adding ppa:ripps818/wingpanel to your system's Software Sources.
There are also some good instructions for installing WingPanel (or configuring gnome-panel similarly to how Bubblegum suggested) here: http://maketecheasier.com/wingpanel-super-sexy-space-saving-top-panel/2011/01/05