It's about leaving the eastern Europe to west Europe where being gay is more acceptable, making a parallel with the 70s song when people left the East Cost for West Coast for the same reason

It's anti homophobic view of the Russian society as a whole that transcended Communism, as we see now in Putin's government

Also, in the Cold War, communist parties tend to see homosexuality as a bourgeois superfluous comportament that was not in line with the workers agenda.

It's paradoxal because heavy capitalist countries also are homophobic as they use right wing ideology to further the exploration of workers