How does Gamaliel survive after he is left in Jerusalem?

Gamaliel survives after being left in Jerusalem by relying on his deep knowledge of Jewish law and his respected position as a member of the Sanhedrin. He advocates for caution regarding the treatment of the apostles, suggesting that if their movement is of human origin, it will fail on its own, but if it is divine, they could be opposing God. His wisdom and status help him navigate the political and religious tensions of the time, allowing him to maintain his safety and influence.