Why can't I load HL2, HL2:EP1 and HL2:EP2 contents on Garry's mod 13?

I can’t see anything about’em on GM 13
I already checked’em and got all of gcf files.
but it doesn’t appeared in map list and spawn menu.
how can I solve this problem?

This happened to me once, i reinstalled Garry’s mod, but i don’t know if thats the solution, but it worked for me.

Follow this tutorial for all of your HL2 games. Garry’s mod no longer uses GCFs: http://forum.facepunch.com/showthread.php?t=1271741

It works! Thanks man

I’m minorly amused you were one of the many who never got informed about SteamPipe, just sayin’

True

Mark as solved please, glad I could help