One may generally observe, that almost all the ācāryas from the Gauḍīya Vaiṣṇava lineage (especially the ISCKON) use this term - "Śrīla", as a title, for their ācāryas, and even for Maharṣi Veda Vyāsa (Kṛṣṇa Dvaipāyana).
For instance:
So, what's exactly the origin, meaning, and significance of this word - 'Śrīla' (श्रील)?
Related: