- Gianni has trained in Krav Maga, a form of self-defense and physical training, first developed by the Israeli army in the 1940s, based on the use of reflexive responses to threatening situations.
- Gianni was diagnosed with Type 1 Diabetes at the age of 15.
- Gianni has an extensive knife collection.
- Gianni is an artist and is developing an original adult cartoon series.
- Gianni shot a pilot where he co-starred with Mary Mouser as his older sister. They are now cast mates in Cobra Kai.
- Being born in October, Gianni loves Halloween.
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