Of course someone can; anything can be reverse-engineered and reproduced. But does it make any sense?

You mentioned the GVM; that wasn't the work of "somebody", that was from Access, the owners of Garnet, and is part of their business plan. So they have an easier time (because they have Garnet to start from), and more incentive (to make money). "Somebody" has neither of those advantages, so it's quite unlikely that someone's going to invest the time to do it.

Still, if you think it's really worth it, get started. Whatever investment you may have to put into learning up-front is outweighed by the size of the project, so you're as qualified as the next guy.