Redirection is within the guidelines provided these three things are considered:
1. The user knows first that they landed on an error page; and,
2. The user know they are being redirected and the page to which they will be introduced; and,
3. The redirection doesn't occur until after a delay of 5 to 10 seconds.

Quite possibly item 2 could have a bailout option that would permit them to override the re-direct and link to a key page in the site. With some query parsing, related pages could be offered. Given enough time to read and respond, the user could be redirected after the prescribed delay.

In your example, Kgun, there are none of these.