Haven't tried either of them yet; I've been busy with other projects.
Closest anyone can do to Gumi yet is to recolor one of the other 'loids to look closer to her, like I did with Rin's head on others' bodies when I made mine. I could probably do a few more outfits for that "Gumi" module later, though. It just takes a lot of time and effort, since I don't have (and can't get) the UV maps for the in-game modules.
I'm afraid you won't find any modules for PD games that actually look like Gumi ought to yet; while changing the textures and re-combining the modules as DLC has been figured out, last I heard, there's no way to import custom geometry. Perhaps in the future!
Or you could just go get Gumi's game. It's called "Megpoid the Music #" and is one of the reasons I haven't touched PD in a while. Whoops?