The query string (name/value pairs) is sent in the URL of a GET request

Hi Experts, My question is bit self explanatory, I need to pass query string in the URL for the GET request. I don’t know that how to start with this in Mendix, Can anyone please tell me that how can I achieve this in Mendix? Do I need to create any service in the backend for retrieving the data from the Mendix database using GET method? If Yes, then please tell me that how can I do that? Example: I need to pass a input parameter as query string in URL and need to get some data as a output according to that.     Thanks in Advance!