Basically, the GL-2's "film mode" is a 30P capture. It's very similar to film, but the truth of the matter is that if you want true 24P, this won't cut it for you.
Personally, I like it for slo-mo stuff, and if I'm being mildly artistic. I have a dream of one day having enough free time to put together a documentary, and for experimentation on that vein I often use the 30P mode. It's good, and probably good enough for what I do, but the hardcore artists out there won't enjoy it, as it is a little bit choppy in comparison to true 24P.