Gautam Swami attained moksh in the 5th āra of the current avasarpinī half cycle, which is called Duḥṣamā (Dusham kāl / Pancham kāl).

This is the same general time-period (same āra and same avasarpinī) in which Bhagwān Mahāvīr’s nirvāṇa took place.