Hello-
Take a look at the Cisco Unified Contact Center Express Editor Step Reference Guide for your version of UCCX at the Get Reporting Statistic step.
http://www.cisco.com/c/en/us/support/customer-collaboration/unified-contact-center-express/products-programming-reference-guides-list.html
In this case you can use a guide for any of the versions listed as the step hasn't changed.
Report Object: CSQ IPCC Express
Field: Logged-In Resources
Row Identifier: The CSQ you're interested in (This could also be defined as a String variable
Result Statistic: This is the value that will be returned and needs to be stored as an int variable
If you use this and the value returned is "-1" that means the CSQ name doesn't exist. It should also be noted that CSQ names are case sensitive.
Hopefully that helps.
DJ