Hi there, Daniel.
Currently, it is not possible to change the keyboard used in the QuickBooks app on iOS. The app follows the default iOS system settings and does not support third-party keyboards like Gboard.
This limitation is primarily due to security measures, as QuickBooks prioritizes protecting sensitive financial information entered into the app.
If you need further assistance with QuickBooks, feel free to post your concerns in the Community. We’re here to help.