Hey there, welcome to the writing forum.
Alright; I'll get stuck in with no further ado.
First, what we have here sounds good, but that's about all I can say without knowing more of the story. Not much has happened yet, so there's no point in me trying to critique the plot. It could go in a million different directions from here. I hope it goes in a unique, unexpected one - that's your job.
Second, the script format: I can see that if the panels were any more complex, they could become difficult to decipher, because they stray pretty far from a 'normal' script format. Now, there's no set format for scripts - and if you're doing your own artwork, then hell, there ain't no harm in writing it in crayon, backwards, on toilet paper, or whatever floats your boat. But there are general standards that help one scriptwriter read and understand another writer's script. Stick to the standard tools and terminology, and artists/editors/collaborators will be able to understand you a bit better, without the extra effort of having to 'work out' what's going on with the format. This isn't really a criticism of the script, just the format, so I'll move on.
(In the meantime, take a gander at this: http://userpages.umbc.edu/~lmize1/writing/essays.html for formatting tips.)
Well, the dialogue's well written. The conversation between Gabriel and Teddy seems authentic enough. So that's fine.
There's one caption I'd change, because the tone seems a bit off. In panel three of page one, the caption reads: "This man is not worthy of anything." I'd definitely shorten this to something like "He's worthless." - it's a lot punchier, and it rolls off the internal-tongue-in-my-head a bit easier.
Also, looking at it again, the first caption of them all tells us that he's up for grand theft auto, etc. I'd probably just take a page or two and show a flash of his past, there. Show a few disjointed panels of him stealing a car, raiding an off-license (oh - liquor store ), et cetra. Go for visual impact. Then show him being led away to jail or something, and his family visiting less and less...
There's an old storytelling axiom that always grates me when somebody says it to me, so I thought I'd pass it on - I'm sure you've heard it. Show, don't tell. Okay, for that, you get one free punch to the lower body if you ever meet me in the street, okay?
That's all I have to say. Definitely keep posting, and post the next couple of pages, I'd be interested in reading them.