Assuming you did not push this deer during your first 200 yds of tracking, it "should" be within the next 200 yds or so. If the deer was pushed it "could" go a ways.

Don't give up on the actual tracks. You may be able to follow them some distance. When all hope of tracking either tracks or blood is lost, take a systemmatic approach. Grid search or circular is up to you. Focus on thick cover, but also little bits of cover in otherwise open areas. Every source of water should be checked too.

In my experience, pure gut shots don't bleed well. I suspect you have a liver hit, and you should fiond that deer dead, but it may take some looking. Don't get discouraged, just get out there and do it.