The intent, of course, it to require it on new guns sold at a certain sunrise date. Once equipped, then, of course, all the schools and other buildings will need to buy the transmitters designating them as gun free zones - on our tax dollar.
The next step would then be to require older firearms to be retrofitted after the next selected date, or they are declared illegal and contraband. If that passes and the public accepts it, then ANY gun not politically correct would also be declared illegal and contraband. See Great Britain and Australia for the unintended consequences.
The best argument against this project is that it's just an effort to shill our tax money and it won't do a thing unless we all commit to it - which leaves just the cops and military with guns that work at all times. If you live within 1,000 feet of a school, it makes you vulnerable to assault, too. Expect muggers and car jackers to work inside the perimeter to find unarmed victims, exactly what we don't need. And, if there is an active shooter, the average citizen who carries won't be able to do a thing except duck and run. Nothing will stop the shooter until SWAT or a First Responder arrives, and it's already a known fact to the wrong people one member of their team can stand off to shoot them in the back.
It's a stupid idea marketed by people with no concern whatsoever about the real results, and couched in terms to sell it to those who aren't qualified whatsoever to decide on it. Which makes it All American in all the worst ways.