Get query string value for URL when filtering CRM Grid view

I want to filter CRM grid view using type "Query String Value". But not getting value from query string.

Fetch XML, Variable and Value have appropriate. i.g. no issue with them, query string is also building fine.

Let me know how to get value from query string.

(query string is like: portal/account-details?Aid=419e5d6f-f806-e711-80cd-00155d026a18)