This movie is not BAD, just low budget...

I agree completely, the atmosphere in the movie is great. i hope for a sequel!!!

I think only the large amounts of close-up shots made me think of it being low budget. But in the ethereal, dystopian purgatory, the close-ups worked. Faces floating in painful darkness.
I think it is a splendid example of what you can do in film without a Bay budget.

I thought so as well. Not only did they come up with a good concept but they followed through and delivered.
Not all film-makers can do that.
I'm not trying to bash another film. Or troll. But for me, a good example of relying on merely the idea( with big budget stars as the draw instead of plot or dialogue or anything unimportant like that) and then failing to deliver is Cowboys & Aliens. It was a decent enough concept. Having nearly infinite possibilities. But the concept only made it as far as the title of the movie. For me the rest was shabbily executed and I was bored. I expected a myriad of possibilities for C&A. Some good. Some bad. But I never expected outright boredom. And Jon Favreau is not a director I dislike.
Gabriel, on the other hand, with merely a tiny portion of C&A's budget, never left me bored.

It's a clever film to watch knowing the issues the film makers had with budgets and the lack thereof. Curiously even though it ended up making money and was generally pretty well - received critically, Shane Abbess appears to have done little film making since Gabriel's release. He's in the midst of making his next film now. I'll be interested to see what becomes of it.