I think this can be simplified to just "Why would an experienced MM short a stock like GVSI?"
At least on the level people are alleging, it makes no sense. GVSI costs $0.03, meaning if it goes down in price they can make up to $0.03 per share, max. Yet if the price jumps, they can lose $0.03+ easily. The potential downside greatly exceeds any potential upside.
I am sure there is some minor manipulation going on, as there always is, but nothing major and definitely no chance of a short squeeze. I hate that that term is thrown around for every single stock now, it's like labeling every product with a meaningless buzzword to the point where it loses all meaning.