Is what was found upon waking from a dream, namely a tremor in the private parts and transparent, whitish, odorless moisture, and the smell of semen later during urination, considered a wet dream necessitating ghusl?

It appears that what you saw was a wet dream necessitating ghusl. The substance was whitish and had an odor resembling the semen of a man, and these are two characteristics of a woman's semen. Whoever doubts whether a discharge after sleep is semen considers it semen according to the Maliki school, in contrast to the Shafi'i school, which allows one to choose between considering it semen or madhy.