According to worldbank.org:

• In 2022 the crude death rate across Gaza and West Bank was 3.0/1000pop/year.
• In 2023 it was 7.0/1000pop/year.

I expect Gaza specific stats are worse. Maybe someone else has further info they can cite, perhaps also relating to 2024-2025, but like others have said, such data is difficult to collect when Israel repeatedly bombs hospitals and their personnel.