I have another possible candidate for Gaige's mother. Granted, most of our theories are probably so far out in left field that they've left Gryphon scratching his head in bewilderment, but it's fun to try anyway. Given her adopted sister Brittany's cameo back in Twilight, at least one of the Usual Suspects has a passing familiarity with Gold Digger, so I'm going to throw out Gina Diggers.
-------- Wedge Defense Force General Order 12: "Try to avoid freaking the mundanes."