Nickelodeon has acknowledged their acquisition of Garfield on social media, having included the title character in collages of their animated properties.

Does Nickelodeon have the rights to Garfield?

Garfield, the lasagna-loving, lazy comic-strip cat is getting adopted by Viacom. The company, which owns Nickelodeon, announced Tuesday that it has entered a deal to acquire Paws, a holding company that owns the rights to “Garfield” and the “U.S. Acres” franchises. ... Davis will continue to produce Garfield's comic strip.

Is Garfield owned by Cartoon Network?

In addition to the new animated series – the first since The Garfield Show aired on Cartoon Network in the U.S. in 2009 – Viacom will manage the global merchandising rights to the property.