I don't think logo belts have to be tacky, it depends on each belt and also how people wear them. I have a few Interlocking GG buckles and other
Gucci belts including a beautiful purple croc G that is also a horse's head, it's flash but it's not tacky. Besides no one has the monopoly on good taste and I hate fashion police.
I also don't see that someone who buys a Gucci belt is somehow inferior/cheap to someone who buys RTW. It sounds clever but it's not true. I think it's prudent to buy accessories that can be worn almost every day and are versatile.
If you went to the trouble of ordering it there's obviously there's something about the Marmont Running '60s GG that you like but it does feel quite exposing to wear. I'm not a fan of the Running GG for myself either, it's a bit obvious but IRL and on some of our members I have seen it look quite fab.