Amazin-A

Honestly the best way to draw gore (assuming you’re talking about guts) is to just reference the real thing. It’s not for the weak of heart, but honestly if you want a realistic depiction of what guts look like then just study the real thing and work at it with whatever techniques you got. 

Honestly I’ve never looked at tutorials on how to draw guts. I may have seen some like, blood tutorials once or twice, but for organs and such I just look up the real thing.