Besides the obvious Green Lantern Corps keyword, anyone know what other keywords he might have?

That's the only keyword he has.

Based on the JL cartoon, I think Brute and Warrior would be appropriate.

Does anyone know what construct comes with him in the pack? I know that Tomar Tu comes with the Net, but I am uncertain of the other ones. Thanks in advance!

He comes with the Mallet which grants Quake, somewhat redundant on the end half of his dial. As for the figure: Galius is a wrecking ball. Incredibly consistent values, tremendous damage output, and bookended with that lovely Will special power. Traited Sidestep is never a bad thing and will help him remain the farthest from your starting area to get those stat boosts. Slap the Shield on him for protection as he approaches and then just bowl over the opposition.

This is my go-to Anti-Red Lantern guy. you have poison? I have knockback! Ah ha!

Is he actually a Prime? All the pictures I've seen, he doesn't have a green ring?

No, hes not a prime. Hes just an alternate. As far as I can tell, the ONLY prime in this set is Tomar-Tu. I think that everything else is just an alternate.

He is a prime, there is an errata for it. The primes in Wave 1 are Tomar Tu and Galius Zed. The primes in Wave 2 will be Laira and Abin Sur.

He is a prime. He might not have the green ring but on his card he has the green background behind his picture.

http://www.hcrealms.com/forum/showthread.php?t=510705

The Final Word. He's as prime as they come.

I'm really getting sick of WiKids Prime nonsense.
Why would you make multiple GREEN LANTERNS prime (two of which are also Lost Lanterns)?!?!
Now they can't be played legally on a team together?
This is the one rule I'll be happy to ignore at my venue just like prime Hyperion and prime Whizzer.

I assume you're talking about Laira and Tomar Tu? So mentioning it on Galius Zed could just confuse people. I do think it was really stupid with the Squadron Supreme characters to be impossible to play together, and its pretty dumb here too, but I think it is cute and clever what they did having all of the primes be green lanterns (because they have a green ring)

Ummm they all have Green Lantern Corps keyword (including Galius Zed).
So that's THREE green lanterns that can't be played together because of that stupid prime rule.

Laira should have "Lost Lanterns" like Tomar Tu, and I just mentioned that as an aside since it's within the subject of what I was complaining about.