Where can I learn more about pilots' dreams during G-LOC?
I'm not sure if you've come across this or not, but the paper Recovery from 
Gz-lnduced Loss of Consciousness:Psychophysiologic Considerations has some details on this phenomenon. It describes the tests carried out on eight volunteers.


This does not appear to be very common- five 'dreams' were recalled out of 21 acceleration runs. The subjects seem to have indicated that these were definitely 'dreams' as opposed to 'thoughts'. Also, the report notes:



  ... it is difficult objectively to determine exactly what the subjects experienced during their individual G-LOC episodes (dream or thought) or even state that G-LOC can be equated to a normal sleep mental state (in relation to dream activity)


Another paper Further Support for the  Concept of a  G-LOC Syndrome: A Survey of Military High-Performance Aviators shows that the dream-like state occurs in about 15% of the cases. 

The 'dream' state appears to be restricted to &lt;13s and vary from person to person (in some cases, they were not aware that they've lost conciousness).