Keyboard Shortcuts Gnome3 – How to Move Windows Across Displays

One of the really powerful things about GNOME 3 is the ability to use javascript-based addons to add functionality. Though I am not entirely sure this addon will completely fulfill what you're looking for, I imagine it is about as close as you're going to get.

Put Windows is meant to be a completely customizable implementation of compiz's put plugin.

Edit: I just realized how old this question was. Much has changed since the OP posted the question, but its spirit appears to still be relevant, and this answer should be helpful.

I got the answer here.

this would be the script to maximize it to the right half of the screen:

#!/bin/bash
# resizes the window to full height and 50% width and moves into upper right corner

#define the height in px of the top system-bar:
TOPMARGIN=27

#sum in px of all horizontal borders:
RIGHTMARGIN=10

# get width of screen and height of screen
SCREEN_WIDTH=$(xwininfo -root | awk '$1=="Width:" {print $2}')
SCREEN_HEIGHT=$(xwininfo -root | awk '$1=="Height:" {print $2}')

# new width and height
W=$(( $SCREEN_WIDTH / 2 - $RIGHTMARGIN ))
H=$(( $SCREEN_HEIGHT - 2 * $TOPMARGIN ))

# X, change to move left or right:

# moving to the right half of the screen:
X=$(( $SCREEN_WIDTH / 2 ))
# moving to the left:
#X=0; 

Y=$TOPMARGIN

wmctrl -r :ACTIVE: -b remove,maximized_vert,maximized_horz && wmctrl -r :ACTIVE: -e 0,$X,$Y,$W,$H

To move to the left, just change the X-Line to X=0. (If you use Ubuntu Unity, you need to adapt RIGHTMARGIN too I use RIGHTMARGIN=102)

defining the right margins this solves the bug, that the second time you call it, it moved to the very top of the screen, ignoring the top-toolbar.