George Goldman is megalomaniacal, but he has a high intelligence. He is deeply desirous of acquiring the alien technology that Tom Evans (Captain Canuck) has been exposed to. He doesn't feel that Tom is worthy of that gift. Mr. Gold himself has managed to imbue himself with the liquid gold that the aliens make use of.
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History
In the 1975-1981 series there was a Mr. Gold with the name George Goldman. The 2015 Captain Canuck reboot created some confusion with his name in that Tom Evans (Captain Canuck) calls him George Gold, but most everyone else refers to him as George Goldman or Mr. Gold. It does appear that his last name is indeed Goldman. Mr Gold in his new iteration is much more physically imposing than the classic Mr. Gold.