Both nrf51 & nrf52 SoftDevice specs say that this can be done:
infocenter.nordicsemi.com/index.jsp
infocenter.nordicsemi.com/index.jsp
There have been a couple of similar questions on this forum requesting an example of using Concurrent Multiprotocol Timeslot API for BLE & Gazell, but to my knowledge, the examples cited either don't include the API or don't include Gazell.
Can someone point me to an example?