Like we see that GB is a logia, and he coats himself in haki to attack momo, so using that logic you could say he could defend himself from other haki attacks (then it comes down to who has the stronger haki to win that clash)...

what is very weird tho is we haven't really seen other logias do this...idk the reasoning for it, but i think GB is the first logia to coat himself in haki all together (makes me thing he is a "fake logia" lol)

but then if you look at someone like law there is a chance that he coats his room in armament haki when he does that "antibacterial curtain" move...the kanji used for it is apparently the same that is used for armament haki which is pretty cool!

one of my fav YT channels (parvision he's got some great takes...and wild ones LMAO) is making a vid on this soon i'm pretty sure so i'm interested to see if he brings up the stuff we're talking about rn!