Hmm ... It's impossible ;-) This RPM doesn't exist on any FTP server

Provides :
config(gdm)
password.so
service(graphical-login)
gdm
gdm(x86-32)

Requires :

libgobject-2.0.so.0
libglade2 => 0:2.0.0
libpthread.so.0
libxklavier.so.15
gdm-libs = 1:2.30.4-33.el6_2
libdbus-glib-1.so.2
rtld(GNU_HASH)
libgtk-x11-2.0.so.0
libgdk_pixbuf-2.0.so.0
libm.so.6
gnome-keyring-pam
config(gdm) = 1:2.30.4-33.el6_2
libpango-1.0.so.0
libgdk-x11-2.0.so.0
libc.so.6(GLIBC_2.1.3)
libXau => 1.0.4-4
ConsoleKit => 0.3.0-9
libdevkit-power-gobject.so.1
libc.so.6(GLIBC_2.2)
audit-libs => 1.0.6
/bin/sh
libpthread.so.0(GLIBC_2.0)
libpam.so.0(LIBPAM_1.0)
libgmodule-2.0.so.0
libpam.so.0
rpmlib(FileDigests) <= 4.6.0-1
rpmlib(CompressedFileNames) <= 3.0.4-1
xorg-x11-xinit
system-logos
libcairo.so.2
xorg-x11-server-utils
plymouth-gdm-hooks
libcanberra-gtk.so.0
setxkbmap
/sbin/nologin
libc.so.6
iso-codes
libc.so.6(GLIBC_2.3.4)
gnome-settings-daemon => 2.21.92
polkit-gnome
libgnomeui => 0:2.2.0
libaudit.so.1
hal => 0.5.9
libcanberra.so.0
libXrandr.so.2
libc.so.6(GLIBC_2.4)
pulseaudio-gdm-hooks
libgio-2.0.so.0
rpmlib(PayloadIsXz) <= 5.2-1
libgnomekbdui.so.4
gnome-session
pam => 0:0.99.8.1-11
libc.so.6(GLIBC_2.0)
libgconf-2.so.4
libc.so.6(GLIBC_2.1.2)
libXdmcp.so.6
/usr/sbin/useradd
rpmlib(PayloadFilesHavePrefix) <= 4.0-1
libc.so.6(GLIBC_2.3)
libm.so.6(GLIBC_2.0)
libXau.so.6
libX11.so.6
libdbus-1.so.3
libgdmsimplegreeter.so.1
libc.so.6(GLIBC_2.1)
libfontconfig.so.1
scrollkeeper
libglib-2.0.so.0
gtk2 => 0:2.6.0

Content of RPM :
/etc/dbus-1/system.d/gdm.conf
/etc/gconf/schemas/gdm-simple-greeter.schemas
/etc/gdm
/etc/gdm/Init
/etc/gdm/Init/Default
/etc/gdm/PostLogin
/etc/gdm/PostLogin/Default.sample
/etc/gdm/PostSession
/etc/gdm/PostSession/Default
/etc/gdm/PreSession
/etc/gdm/PreSession/Default
/etc/gdm/Xsession
/etc/gdm/custom.conf
/etc/gdm/gdm.schemas
/etc/pam.d/gdm
/etc/pam.d/gdm-autologin
/etc/pam.d/gdm-password
/usr/bin/gdm-screenshot
/usr/bin/gdmflexiserver
/usr/lib/gdm/simple-greeter/plugins/password.so
/usr/libexec/gdm-crash-logger
/usr/libexec/gdm-factory-slave
/usr/libexec/gdm-host-chooser
/usr/libexec/gdm-product-slave
/usr/libexec/gdm-session-worker
/usr/libexec/gdm-simple-chooser
/usr/libexec/gdm-simple-greeter
/usr/libexec/gdm-simple-slave
/usr/libexec/gdm-xdmcp-chooser-slave
/usr/sbin/gdm
There is 210 files more in these RPM.