How to grep from a GZ file on Linux System
There are few ways by which you can grep from GZ files on Linux .The best way is to use the zgrep command as follows
zgrep -c "post-classifieds-ads HTTP/1.1" access_log.11.gz
In the above example i used the grep command on access_log.gz file to get the count of post-classifieds-ads in that file.

471714 658815I got what you mean ,bookmarked , really good internet web site . 230530