When attempting to connect to your destination SharePoint environment, Sharegate displays the following error message:
This specific tool only supports SharePoint 2010 and above as destination.
The Sharegate Copy Site Object tool is designed to migrate content from earlier versions of SharePoint (2003 and later) to a new environment and can only do so on a SharePoint environment that is at least 2010.
Sharegate can be used to migrate content (using the Copy SharePoint Content tool) to and from any version of SharePoint (2003 and later). Therefore, to bypass this issue you can manually create the structure (Lists, etc.) and then use the Copy SharePoint Content tool to migrate all documents and list items to their respective new lists.