Yeah, Sun Elves as far as I know don't seem much CG in the majority. And the way Gex paints them as a fading empire makes me think of the Tolkien elves as opposed to the Sun elves specifically. Tolkien elves seemed very 'Lawful Loser' as Gez put it.
IMHO, I can only somewhat re-interpret Sun Elves as CG by trying to explain what they do as CG behavior. Say, for instance, that they value individual freedom over order -- that doesn't mesh with how they arrange empires and don't like those who aren't in them, or in their view of the world as a heirarchy with themselves at the top. Say they overall have compassion for each other...well, I imagine even truly wicked creatures can at least respect, if not love, other truly wicked creatures.
They certainly seem hardcore LN to me, bordering on LE (with the mating with fiends). They divide an categorize, they mistreat and disrespect, they verge on outright seeking out the other races and hurting them, and it seems only their penchant for whining about things stops them from doing that.
Now, why are they CG in the book? This, I have to attribute to 'Teh Kewl Factor.' CG is 'Teh Kewlist' alignment, because it doesn't imply being a stick-in-the-mud Lawful type, and it implies being all rebellious and chic and you can still be heroic. Elves, of course, are 'Teh Kewlist' race...being...y'know....elves and all...honestly one of the most-loved of any fantasy race because they're all cool and agile and sexy and artsy and the like the environment and they of course have to be CG, because being 'Teh Kewlist' means you have to be the best at everything, even alignment, so you can be heroic and rebllious and free just like EVERYONE WANTS TO BE!
This, I imagine, may also be part of the reason people would fight against them being anything but CG.
Now, most D&D elves as described are pretty decently CG. They're flighty and whimisical and they preserve individual freedom and the joys of hugging trees. They're also slightly biased, but that's just because they like who they are a lot, not because they don't like the others (Sort of an "I'm cool, I don't care what you are" attitude).
Sadly, most Tolkien elves are pretty hardcore Lawful.
And when D&D tries to hyrbidize them, translations stop being effective...
Lawful Elves always seem to have to go for those Human deities. So, unless you want the Sun Elves to begin worshipping Bane or Helm...
Or you make up a new god....think of it. SunElf scholar comes out of his musty tomes to say "I've done it! I've discovered it! There is a power above Corellon Larethian! It is the divine truth of the magnificent Llaweyellnae! So elvish, even we highest of elves have trouble pronouncing her name! She is the mother of Corellon, who was her child by the rape of Grummsh, which she could've stopped, of course, but didn't want to because the Ways of Gods are Mysterious, and Our Gods are the Most Mysterious! Anyhoo, that's why they faught! Because Corellon didn't like his birthright! And this proves we're purer!"
Sounds at least partially believable to me.
