Olympus is also in Arborea on the Great Wheel, so according to Planescape, it is available to all settings.I’ll just point out that some of the names suggested thus far are just a problematic as the names being avoided. Don’t like “Geek Pantheon” because Greece doesn’t exist in your game world? “Olympian” has the same issue- Olympus, the home of the Greek gods, was on Mount Olympus, a particular mountain in Greece.
My advice is to ditch the RW names as completely as you can, and substitute references to the game world. You might even use a language translator like Word Hippo or Bing Translate to make things sound a bit better. So “Olympus” might become “Theopolis”, and the the inhabitants, “Theopolitans”.
Or perhaps the gods’ city is on a mountain in your campaign world- let’s call it Mount Eskan. The deities who live there might be called “Eskanian”; their city, “Eskanopolis”.