The GA Parameters Extractor add-on for Google Sheets connects to your Google Analytics accounts to help you spot unwanted query string parameters in your Google Analytics views that may distort your page metrics, expose personal information, or simply dirty the URLs of a website.

It lists all the query string parameters that appear in a Google Analytics view of your choice and lets you know in how many unique URLs they were seen (occurrences), how many times they were seen in total (views) and gives you an example URL in which the parameter was spotted.