Jati + Śramaṇa + Jñāna (knowledge) would literally mean:

• Jāti: birth, lineage, caste, or the cycle of birth.
• Śramaṇa: a renouncer or monk (a Jain monk is a Śramaṇa).
• Jñāna: knowledge or understanding.

So “Jāti-Śramaṇa-gyān” would be understood as knowledge about the Jāti (birth/lineage or the birth in the cycle of rebirth) in relation to Śramaṇa (renunciation), or more simply, knowledge pertaining to the renounced path in the context of birth and karma.

However, this exact composite phrase does not correspond to a well-known, fixed term or sutra in standard Jain texts. It may be a mishearing or a shorthand for a related idea (for example, general knowledge about the birth–death cycle and the renouncer’s path). If you have a specific source or context where you saw this term, please share it and I can give a precise Jain‑text-based explanation.

You can read more on related Jain concepts here