There is no alternatives to GUROchan.
r/guro and some Discord servers exist I guess, but neither allows loli and their continued existence depends on how reddit/discord mods feel like

What >>2497 said. Besides reddit, 4chan also has "guro threads" on /trash/, the only board that allows them, and it's all weakshit ryona (also no loli guro, or anything deemed "too gruesome", allowed). gurochan covers all niches, so much so that it might be too niche for it's own good. What killed the userbase was the nearly 2 year long absence of gurochan, and the constant switching of domains. That and the lack of spreading the word about its return. Sometimes, I curiously search 4chan archives of ryona threads, and whenever GC gets mentioned, the replies are always "I thought that died years ago" and "do the mods still delete loli?". Gurochan's had a rough existence, but I still come here and post everyday. Try contributing OP, because no one wants to hear from a leech.

>>2498
I thought guro threads were also allowed on /b/.

>>2508
You can make guro threads on /b/, but they'd get pruned in less than 10 minutes. No one can compete with the same "wanna see hawt pics of my wife?" threads that get posted all hours of the day. Would you honestly rather attempt fighting the spam on /b/, instead of using a site that CATERS to all of your guro needs?

There is no altenative for GUROchan because there can be only one winner! GUROchan is the best! The last free corner of cyberspace on the clearnet! What is dead can never die!