Not entirely sure how you go about this, but I plan on removing each god and claiming Mount Olympus as my domain. Sooo umm who do I have to pm? xD
Well first you'd have to start a discussion thread about Greek mythology, so that everyone who has plans with Greek mythology, and those who already have done something with it can have a say in this. With that, you should start a PM with whoever goes to your thread and says they're interested. In any case, you could just use this thread for it :)
I'm sort of interested, though I don't have any plans for the Greek Gods. I'd suggest going through the process (setting up a pm to discuss it with anyone interested, waiting on the CoE's decision, ect.).
Beware the CoE though if you intended on starting it fast.