As the wikipedia article stats, the idea was proposed first by Christians rather than skeptics, arguing that it's a weak form of faith, so you're definitely right on that point.
> Whether the God of the Gaps points you towards atheism or theism depends on your concept of the unknown
I really like this assessment. Looking at the sibling comments here, most seem to think all questions will be answered eventually, but I suppose that's impossible to know, since we don't even know what all the questions are yet.
Whether the God of the Gaps points you towards atheism or theism depends on your concept of the unknown. If you think of it as a fixed sized bucket of things gradually trending towards zero due to the effort of science, then you are an atheist. If you think of the unknown as practically limitless in size and our process of discovery as barely scratching the surface, then you are pointed towards theism. Generally, materialists trend towards the former and phenomenologists towards the latter.