From Pluralpedia, the collaborative plurality dictionary
exogod (n.)
Applies toheadmates
CoinerWanderheart Collective

An exogod is an entity considered, experienced, or self-identified as a god external to a system.

This term works as an umbrella term for external gods, including, but not limited to proxied ("godphoned") external gods, channeling gods who don't identify as headmates/intragods, gods encountered on the astral, and gods encountered as a "sensed presence".