ubuntu-gnome@ubuntu-gnome:~$ sudo dpkg -i *.deb
Selecting previously unselected package gdm.
(Reading database ... 161439 files and directories currently installed.)
Preparing to unpack gdm_3.14.1-0ubuntu3_amd64.deb ...
Unpacking gdm (3.14.1-0ubuntu3) ...
dpkg: dependency problems prevent configuration of gdm:
 gdm depends on libgdm1 (= 3.14.1-0ubuntu3); however:
  Version of libgdm1 on system is 3.14.1-0ubuntu2.
 gdm depends on gir1.2-gdm-1.0 (= 3.14.1-0ubuntu3); however:
  Version of gir1.2-gdm-1.0 on system is 3.14.1-0ubuntu2.

dpkg: error processing package gdm (--install):
 dependency problems - leaving unconfigured
Processing triggers for hicolor-icon-theme (0.14-0ubuntu1) ...
Processing triggers for man-db (2.7.0.2-5) ...
Processing triggers for ureadahead (0.100.0-19) ...
Processing triggers for dbus (1.8.12-1ubuntu5) ...
Errors were encountered while processing:
 gdm
ubuntu-gnome@ubuntu-gnome:~$ sudo apt-get install -f
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Correcting dependencies... Done
The following packages will be REMOVED:
  gdm
0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded.
1 not fully installed or removed.
After this operation, 1,602 kB disk space will be freed.
Do you want to continue? [Y/n] y
(Reading database ... 161550 files and directories currently installed.)
Removing gdm (3.14.1-0ubuntu3) ...
Processing triggers for man-db (2.7.0.2-5) ...
Processing triggers for hicolor-icon-theme (0.14-0ubuntu1) ...
ubuntu-gnome@ubuntu-gnome:~$