Kids? Totally normal. Whether it's boys or girls, kids are supposed to be cute so that adults will feel naturally compelled to take care of them. Or at least not kill them. It's why people design "cute" characters with neotenous features, like large eyes, smaller than usual proportions, and big cheeks. We're naturally inclined to admire these features in children, so we admire them in characters designed that way as well.
Adults? It's not gay to acknowledge someone's objective physical attractiveness. I can acknowledge that Chris Evans is a handsome man without wanting to suck his dick just as much as a woman can acknowledge that Scarlett Johansson is beautiful without wanting to eat her snatch. Now, I don't know what a "cute" guy looks like in real life, but I can understand seeing a cartoon character and thinking they're cute, probably because they're designed with features mentioned above, or similar ones.
Now, if you often think to yourself, "man, that male character is really cute. I'd really love to shove my cock up his tight, round little ass and fill him with my seed and then gargle his cum in return," then yeah, that might be a little gay. Just a little.