Is being 'cute' as a guy a good or bad thing

Since when being cute is a bad thing?
You guys are strange....

I think the issue is that there's often some confusion with the literal meaning of "cute" (e.g. a puppy or small child that's adorable), and the American high-school slang meaning (e.g. "I want to hang out at the beach and check-out all the cute guys there"). The obvious fear is that the former definition desexualises them... although (IMHO), it's still a hell of a lot better than being called ugly, repulsive, revolting etc... or even plain / average.

Exactly, it is still better than plain no matter how you look at it.

A cute guy turns me off personally

TBF, I think it's slightly different for guys; maybe it's to do with gender stereotypes or expectations... but definitely from a girls P.O.V. literally cute girls are still liked by many people (for example Emma Bunton was the cute one in the Spice Girls, but she was desired by guys as much as her bandmates ... even more-so than a couple of them?). I reckon it's also to do with the "macho" attitudes that exist (e.g. as a man, you're supposed to be strong, confident etc.) and more recently, the obsession with so-called "Alpha Males", whereas someone who's "cute" triggers more nurturing / protective feelings rather than being the "protector" (so to speak).
But I do take your point that it's certainly not the worst thing to be called (just not as good as being called "hot", "fit", "sexy" etc. )
This is exactly the sort of thing I mean _{(assuming she's talking about literal cuteness, of course)}

I like cute guys more than "macho" wannabes, also, most alpha males are really loving, they are more controlling. Cute guys more often make a good love and care objects both ways, which is something I personally value more than feeling safe behind the wall thing... I'm generalizing, but that's my observation...

One time I left a room and a girl shouted "OH MY GOD (my name) IS SO CUTE" also sometimes I hear girls whisper to each other that I'm cute. Does this mean I look good? Or what does it mean?

I'm not disputing that (and fair play to you)... I know a few girls who specifically go for guys with a "cutesy" look, so you're definitely not the only one. However, I AM speaking from the P.O.V. of a male who wants to fit in and be desired.. especially impressionable teenagers. There's all sorts of peer-pressure to conform to be a particular kind of guy who can look after himself, good at sports and handle most situations, and unfortunately a guy who's literally cute doesn't (really) send that kind of message. An extreme example is all the BS that comes from the manosphere, which a lot of youngsters are exposed to these days, but there are other examples (e.g. "Are you a man or a mouse?" type comments) . There's all sorts of evidence of that peer-pressure all over this particular part of the forum.

Do you see it more of a thing within the male group showing off than being liked be girls thing?
I mean, I'm sure far less girls are looking for the fake "macho" guys and would prefer them to be 'cute' rather than a 'macho' wannabes?
I mean, if you are 'cute', be 'cute', don't be something you aren't.
Girls have their things too... "no boy will like a flat chested girl" or "you have to put makeup on because otherwise guys will not notice you."

Girls have their things too... "no boy will like a flat chested girl" or "you have to put makeup on because otherwise guys will not notice you."

A good thing obviously, dum dum. Free easy access to poon poon, while other men scrape the barrel of bad attitude entitled very average looking lasses.