Hello and I was at rental property yesterday fixing the old garage and the renter gave me this quart of QS ATF. Still full also. Never saw this or paid any atttention back then. Don't know what I would do with it either
Find a car that uses Dexron or Mercon ATF in the power steering system, then replace the power steering fluid. 1qt usually cleans the system up very well.
All the T56 six speed transmissions from 1993-2002 and later were specced with DEX 3. That stuff might be a lot stouter than what is being sold as generic DEX 3 today. I'd use it in my T56.
Check to see if the oil is clear and bright. Look at bottom of bottle for additive separation. If oil looks OK it will make a fine general purpose oil for lubricating gate hinges.