Alehstudio

Excellent!

If it's the team member gallery you want to customise the code would be 
.summary-item a[href^="/en/teamphoto"] { pointer-events: none; }  

Thank you very much!!! It worked great!
Alessandro

Do you have a link to a page with such a summary block?

As a test I created a gallery called test gallery. 
Then I gave some of the items in the gallery links 

 
I created a summary block on another page that uses the gallery as the source of its images. 
Then I created a css rule to kill pointer events for any summary items whose link is from the original gallery (begins with /test-gallery).
It works as expected. Items with no clickthrough url have a standard cursor and are not clickable but those with a clickthrough work properly. 

Here is the code - insert it at the bottom of your custom css area after any other code that may already be there. You'll need to tweak href ^= "***" to reflect your gallery slug 
.summary-item a[href^="/test-gallery"] { pointer-events: none; }