Hi,
Not exactly, an FMOD Engine | Core API Reference - ChannelGroup is like a FMOD Engine | Studio API reference - Bus, while a bus is not like a channelgroup. However, we can use our bus to access the channelgroup we want to play our sound on without having to worry about the index of the channelgroup. I have an example of accessing a specific Bus in Unity here: Audio Stream to programmer instrument - #4 by Connor_FMOD, hopefully this is what you are looking for.