How does polonius spying on the scene between hamlet and Gertrude indicate a change in Gertrude's status?

Polonius spying on the encounter between Hamlet and Gertrude reveals a shift in Gertrude's status from a passive character to one increasingly caught in the web of political intrigue and familial conflict. Her relationship with Hamlet becomes more complex as she is now an object of manipulation and observation, highlighting her vulnerability. This act of spying also underscores the tension in the royal court, suggesting that Gertrude's actions and choices are being scrutinized, thus diminishing her autonomy. Ultimately, it signals a transition in her role from Queen to a pawn in the schemes of those around her.