Yes there is!
Seth posted this on the Discord channel :
GOOD NEWS, @everyone ! YoYoGames has put together a temporary Shenanijam license for Game Maker Studio 2. For those of you who wanted to try out Game Maker Studio 2, now is your chance! The licenses expire on May 29. Get them here: https://account.yoyogames.com/promo/shenanijam
Enjoy & good luck for the jam!