Appearance of User Ads from Organic Sources

[XPgalaxy]

Hello; when I search for a keyword and enter my site organically, the URL becomes domain.com/page-name/?gclid=EAIaIQobChMIyMTE3LLf7gIViOhRCh0qewCTEAAYASAAEgIUwPD_BwE, and when I check Google Analytics, it shows up as coming from CPC, meaning it appears as if it came from an ad. The ad is not running at the time I accessed it; how do you think this is happening? It only occurs on a single page; I checked other pages, and this issue does not exist.