King County GIS data is at:
https://gis-kingcounty.opendata.arcgis.com/ (new KCGIS Open Data site)
OR
http://www5.kingcounty.gov/gisdataportal/ (legacy KCGIS data FTP download portal)

Index and download location for King County Superior Court civil, criminal, domestic general defendant, general paintiff, and probate records from microfiche

Index and download location for King County Superior Court civil, criminal, domestic general defendant, general paintiff, and probate records from microfiche

Index and download location for King County Superior Court civil, criminal, domestic general defendant, general paintiff, and probate records from microfiche

Link to King County GIS Center Open Data site. Provides access to browse and download from hundreds of enterprise data sets. Includes links to other data sources including legacy FTP Download Portal