Gaia utilizes all vanilla spawners plus quite a few custom spawners aswell. If you want to know where a specific creature spawn, see the spawnsheet.
So far, Gaia is the creature mod that has most compatibility with custom maps spawners. If you want your maps spawners added, contact us on Discord. I've made these available to the public, see this repository.
As of right now, the following maps own custom spawners is implemented in Gaia;
The Island –
Ebenus Astrum – https://steamcommunity.com/sharedfiles/filedetails/?id=916417001
Crystal Isles – https://steamcommunity.com/sharedfiles/filedetails/?id=804312798