Thread:Project:Support desk/Defining a new query string

My setup:


 * mediawiki 1.23.5
 * php 5.5.17 (apache2handler)
 * MYSQL (5.6.21)

How can I do something like this for my own wiki?

https://www.mediawiki.org/w/index.php?title=Project:Support_desk&offset=20150117005827&limit=20

Is there anything special that I have to do to be able to use the ampersand ('&') in the URL? I know there is a hook for unknown actions, but how would I be able to use something like '&offset=100' as used on the support desk project?