We have web gateway 7.7. We have enabled SafeSearchEnforce option on thr Web gateway. But this didn't solve our problem. Our problem is to catch search string for example google and to add "&safe=active" in to search string. How can we do that?
I would actually venture to guess you have SSL Scanning disabled, which prevents safe search from actually working. If SSL Scanning is enabled and safe search is still not working, then file a ticket and provide rule traces demonstrating the issue.