Should i allow shock gloves to be a weapon focus? I can't find anything in the rules prohibiting it other than the old stand-by "magic and tech don't mix"

Sure, but be sure they know that the shock aspect doesn't stack with the boost, or work in the Astral. Technically, Unarmed in general doesn't work (I'm told?), but there's no great reason for that (see also Hardliner Gloves).

Why would the shock be augmented by the focus? My understanding is it just boosts the "to hit"

Sorry, I meant the unarmed *damage*, as per normal rules.