I have created an organization query using the criteria of Organization Matches Gifts = Yes. When I try to save the query it gives me an error: Query not saved.
This is resolved in 7.96 patch 13, released in September - October 2018 and applied to databases in Blackbaud Hosting Services. If your database is installed locally, download and install the latest version and patch, if applicable.
In previous versions: Create a constituent query with the same criteria. There is not a need to add Key Indicator or other criteria since Individuals cannot match gifts.