This root form (lemma) is used in 2 different forms in the NT: συστρέψαντος (PAA·GMS), συστρεφομένων (PPP·GMP).
It is glossed in 2 different ways: ‘being gathered’, ‘having gathered’.
OET MAT 17:22 Greek word=συστρεφομένων (sustrefomenōn) Morphology=PPP·GMP English gloss=‘being gathered’ SR GNT MAT 17:22 word 1
OET ACTS 28:3 Greek word=συστρέψαντος (sustrepsantos) Morphology=PAA·GMS English gloss=‘having gathered’ SR GNT ACTS 28:3 word 1