Gadget export
From Tardis Wiki, the free Doctor Who reference
To export the infoboxes-mobile gadget, click on "Download" button, save the downloaded file, go to Special:Import on destination wiki and upload it. Then add the following to MediaWiki:Gadgets-definition page:
* infoboxes-mobile [ResourceLoader|hidden|type=styles] | ms-Infoboxes-mobile.css
You must have appropriate permissions on destination wiki (including the right to edit system messages) and import from file uploads must be enabled.