Does Gang Beasts have split screen?

Yes. Gang Beasts supports split-screen local co-op on one machine.

Yes, and it is the point of the game. Four locally on console, up to eight on PC depending on your controllers.

Players	up to 8
Crossplay	PC (Microsoft Store), Xbox One, Xbox Series X|S
Split screen	Yes
Platforms	PC (Windows, Steam), PC (Microsoft Store), macOS, Linux, PlayStation 4, Xbox One, Xbox Series X|S, Nintendo Switch, Oculus Rift (historical, delisted)
Released	12 December 2017
Developer	Boneloaf (Steam also credits Rocket Science)
Price	$19.99

Also about Gang Beasts

• Is Gang Beasts crossplay? — Only partly — and if you bought it on Steam, no.
• How many players is Gang Beasts? — Gang Beasts supports up to 8 players.