We know that the Soul Stone has the flexibility to move individuals to some kind of other-realm — it is the place Thanos wakes up after he kills Gamora and finds the Soul Stone newly embedded in his Gauntlet, and it is also the place he finds and talks to little one Gamora after he murders half the universe’s inhabitants.
This may be a stretch, however each dimensions are mysterious and haven’t got many established guidelines. Maybe Scott will determine a strategy to escape the Quantum Realm, and that’ll assist Gamora escape from the Soul Stone Realm. Maybe each realms exist in the identical place. Who is aware of?