Nityanand maharaj ji acharya of which gaccha

Nityanand (Vijay Nityanand Surishwar Ji Maharaj) is the Gachchadhipati of the Tapa Gaccha in Śvetāmbara Mūrtipūjak Jain tradition. This gaccha-headship leadership can change with time, but in recent listings he is noted as the Gachhadhipati of Tapa Gaccha. ( jainknowledge.com)

You can read more here