GGS diamond

Hi, I’m looking for a set of diamond earrings for my wife without breaking the bank. I found this site, Century Diamonds, but am skeptical. Eveeeyrhing is super customizable, but I can’t find anything on a GGS certified diamond. Should I stay away from this? Here are the couple I’m looking at for reference …

https://centurydiamonds.com/diamond-stud-earrings/stud-earrings-collection/stud-earrings-252113.html?center_stone_type=di&center_stone_shape=pr&center_stone_weight=0.5&center_stone_color=f&center_stone_clarity=si3&metal_type=14k%20White%20Gold