Can the windows be set to minimize to a dock? For example, Im using GNOME shell with unity 2D and I would prefer the windows to minimize to their respective launcher. Example: instead of the open window minimizing to its icon in the launcher, it goes to the corner.
I recommend not minimizing your windows. The minimize and maximize buttons have been removed from windows in Gnome Shell for a reason. There's really no need to minimize windows, so if you're going to use Gnome Shell, I would recommend kicking the habit. Gnome Shell has an amazing way of handling workspaces, I recommend using it. I don't see a workspace switcher launcher on your Unity bar in your screenshot, so I'm taking Gnome Shell handles your workspaces? Either way, with workspaces you never have to minimize windows. The advantage of having Unity is that you could quickly go to that application on whichever workspace by clicking on its launcher.