When using the Confluence rest API, how can I use a uri with a question mark instead of %3F?

[Alexis Evans]

I am using a rest API call to confluence in the scripting language Groovy (using Adaptivist Scriptrunner for Jira). I am setting the uri path in the api call, but it includes a question mark so I can use parameters. When I run the code, at some point it replaces the ? with %3F, and then the api call doesn't return anything.

Is there a way to get the uri to use something other than percent encoding so the question mark goes through? Or is there another way to add parameters to the end of the url? For example, I have the url to our instance of confluence followed by /rest/api/content and then I want to add parameters after a question mark so the url is
/rest/api/content?title=page_title&spaceKey=KEY&expand=body.storage but after the code is run, it tries to access the url /rest/api/content%3Ftitle=page_title&spaceKey=KEY&expand=body.storage which obviously doesn't return anything. Any ideas?