Goddess is. The lore about gods seems very confused.
The Goddess (AKA "Spirit") of Maple World is Sugar. She's the one you summon when you cast the skill Maple Warrior, and the one you speak to for the 5th job advancement. Her counterparts are Grandis (left) and Tynerum (right). They're spirits of the world, so they embody the world itself. These are the statues in the Alliance Outpost.
They're separate from the Transcendents who maintain balance in each world by holding the powers of Life, Light, and Time. Transcendents can be gods (Rhinne, Alpha and Beta, Aeona), but are not necessarily gods (Alicia, White Mage, Darmoor).
There are also several minor gods and goddesses (God of the Mountains, Minerva, the Great Spirit, etc). Those gods typically play a part in individual storylines (Korean Folk Town, Remnant of the Goddess, Mercedes' storyline, etc), not the main storyline. (less)
Maplestory often uses the Greek alphabet phonetically in place of "magic-looking" runes. Every sign in Orbis is similarly spelled with Greek (for example, the … (more)platform signs say "ΠΛΑΤΦΟΡΜ": Pi, Lambda, Alpha, Tau, Phi, Omicron, Rho, Mu, I.E. "platform").
But as far as the ring saying anything, it doesn't look likely. One part of the ring looks to say "Ηλαρψ νδ"->Eta, Lambda, Alpha, Rho, Psi, Nu, Delta->"Hlarps nd" (less)
Some players have speculated that Tara Strong voices Beta in Zero's storyline.
In some of the Maplestory animated shorts, Yuri Lowenthal and Tara Platt are featured, and Bruno Oliver … (more)voiced the Black Mage in the New Leaf Saga shorts. You can find a list of those actors and actresses here: https://www.imdb.com/title/tt2071131/fullcredits/?ref_=tt_ov_st_sm
Brian Schmoyer, having animated, written, and directed the shorts also voiced a number of characters, however I do know that Schmoyer went through some problems and blames video games for said experiences, so I wouldn't put too much faith in him voicing any modern characters.
But as far as I know there hasn't been an official cast list compiled. IMDB does not have a page for Maplestory, and as you might have noticed above, their articles are rather incomplete to begin with. (less)