Georgii Mikhailovich did not inherit Novo-Mikhailovskii on Palace Embankment upon the death of their father, his older brother Nikolai Mikhailovich did. All three brothers--Nikolai, Georgii, and Sergei Mikhailovichi--lived together in Novo-Mikhailovskii; of course, in different parts.
As far as the Vladimirovichi: Kiril had a palace on Glinka Street, Andrei had a palace on the English Embankment--28 English Embankment, and Boris had a palace in Tsarskoe Selo.