(I know you saw already but incase anyone else was wondering the same XD)
Sadly we aren’t working on the mod anymore as most of the main developers are busy with other things and no longer have time to work on the mod D:
Viewing post in Gacha Luminals Official Download! comments
well, I would like to offer to give you access to an APK of luminal that actually says it's Gachs Luminal and not replace Gacha Club. I understand the mod isn't being worked on anymore, but it's the least I can do, just to make things easier for people that want to check the mod out, and not lose Gacha Club. (I did not fix the lag issue though, I'm only good at editing an apk's package name. ☹️)
Edit: Forgot to mention it's free