cant read german but i'll just assume you said:
"me need depth of field, me like DOF long time, gimmi DOF :D"
there are only two depth of field shaders that i know of with gs, one is from shadeC:
http://www.opserver.de/ubb7/ubbthreads.php?ubb=showflat&Number=273341#Post273341and the other is from slins shader collection, though it doesnt seem to work well if you ever change the FoV, i dont have the link for it though so maybe someone else can link you