Jack Sarfatti claims that his Physics Consciousness Research Group at The Esalen Institute were an inspiration for the Ghostbusters. [1, 2]
Office of Scientific Investigation and Research is also cited as an inspiration for the Ghostbusters. 
Goser may be based on the Sumerian god Tiamat. 
‘Philadelphia mass turbulence of 1947″ – any connection to the Philadelphia Experiment?
Janine asks Winston if he believes in: “UFOs, astral projections, mental telepathy, ESP, clairvoyance, spirit photography, telekinetic movement, full trance mediums, the Loch Ness monster and the theory of Atlantis.”
Jungian analysis of Ghostbusters.