Index match

Hello,

I am trying to use formula index match to match in a summary table. I want to add this formula in order to search in another spreadsheet for the value in cell GS 3.
When found, I want to retrieve the value of the cell next to the match.

In the first picture I have the spreadsheet with the summary.

In the second picture I have the spreadsheet where I am going to look for the value.

01.PNG

02.PNG

How can I do this correctly?

Thanks

NM