User filtering of a GB Query Loop?

Hi team,

I'm using GB Pro Query Loop to create a list of Service Provider pages. I use Categories to organize these Service Providers.

Now I know I can display only pages with a specific category, but I'm trying to let users filter the long list of all Service Providers by selecting the Category they want to see. I'm imagining a dropdown or radio buttons to select the category.

However, I'm not sure it's possible to make the Query Loop available to user input that way. Is there a way to achieve that without fully custom code?

Thank you

PS: I found this video of a developer creating something like that https://www.youtube.com/watch?v=FPxTDOsm1xM but I can't assess the code, and I wouldn't be able to maintain it anyway.