For all who are having the issue with Intel not booting into GDM:
This is how I solved the issue: When booting of the installation media, make sure you switch to tty2 by pressing ctrl+alt+f2. You will get a login there, I just logged in with root. Then at the prompt do a “systemctl stop gdm” which will stop gdm from loading. after navigate to /etc/X11/xorg.conf.d and then use your favorite editor to create a file called 20-intel.conf which has the following contents:
Identifier "Intel Graphics"
Option "AccelMethod" "sna"
Option "DRI" "true"
Save the file and then do a “systemctl start gdm” This will get you to the desktop and start the installer. After the installer is finished and you reboot your machine you will have to perform the same task again but then its done in the installed system with your login username and password. After you have have done the procedure and gotten to a desktop you will need to do the following to get everything working correctly with the intel driver:
Under /etc/modprobe.d create a file i915.conf and type the below:
options i915 i915\_enable\_rc6=0
Save the file and then edit the file /etc/mkinitcpio.conf and add the following to the line MODULES"" so it reads:
MODULES="i915 drm\_kms\_helper intel\_agp"
Save the file and perform a “mkinitcpio -p linux”. After its completed just reboot and you should have a perfectly working desktop.