Gautama Swami, one of the chief Ganadharas (principal disciples) of Lord Mahavira, is highly respected in Jainism for his deep devotion, knowledge, and spiritual discipline. Regarding "tap" (austerity or penance), Gautama Swami is known for his practice of various forms of tapa (austerities) as prescribed in Jain teachings.

Gautama Swami performed severe austerities and engaged in deep study and reflection to overcome his passions (kashayas) and attain spiritual progress. His penances included fasting, meditation, self-restraint, and strict adherence to the teachings of Lord Mahavira. Even after being a highly learned scholar, he remained humble and continually sought spiritual advancement through tapasya.

One notable instance is after Lord Mahavira's nirvana (liberation), Gautama Swami felt deep grief and longing. With great devotion, he performed intense meditation and penance, and eventually, he attained keval jnana (omniscience) on the day after Lord Mahavira's nirvana, on the morning of Diwali. This event highlights the significance of his tapasya and spiritual achievements.

In summary, Gautama Swami set an example for all Jain aspirants by practicing strict tap (austerities), self-control, and deep devotion, ultimately achieving keval jnana through his efforts.