Yesterday, Press Secretary Spicer said the following
Here is @PressSec hinting at #DonaldTrump using #ExecutiveOrders to allow guns in schools. @Thehritzinator pic.twitter.com/47ZxqvEzMo— Khary Penebaker (@kharyp) February 1, 2017
EdWeek notes that, as the gun-free school zones are NOT by executive order, but by act of Congress, they cannot likewise be undone by executive order:
"The federal Gun-Free School Zones Act was signed into law by former President George H.W. Bush in 1990 after being introduced by former Sen. Joe Biden, a Democrat, who is now the vice president. The key provision of the law is that it prohibits an individual from knowingly possessing and discharging a firearm on school grounds or within 1,000 feet of school grounds, with certain exceptions. As a law signed by a president after being passed by Congress, the Gun-Free School Zones Act cannot be undone by executive order."