Welcome to the forum. Here's something to try:

Set the Melody (or Soloist, your choice) track to Channel 10 (so it plays percussion), by Options, Preferences, Channels.

Then go into the Staff Roll Notation Mode, find a suitable sound, and enter it where needed. Perhaps top line A of the bass clef, which is a cymbal. "Gong" isn't one of the MIDI sounds in the BIAB drum kit (Options, Preferences, Drum Kit) so you'll have to fish around a bit, and it's possible you will not find the sound you want.


BIAB 2025 Win Audiophile. Software: Studio One 7 Pro, Swam horns, Acoustica-7, Notion 6, Song Master Pro, Win 11 Home. Hardware: Intel i9, 32 Gb; Roland Integra-7, Presonus 192 & Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors.