That is not permitted on the site. I recall users complaining on twitter that they were banned for posting that sort of material on gab. They argued that gab wasn't really supportive of free speech for suspending them. The head of gab replied by saying any pornographic representation of a child is illegal in many states, so it is not permitted on their site. Twitter and facebook have also had problems with perverts posting disgusting things like that. If you see it, report it.
Do you seriously want to see what was up on Gab for months and months at a time? It’s saved. I’m sure it won’t be allowed on FR.
“Child porn” is clearly illegal when it’s photos of actual children.
Hand-illustrated high-def “cartoon” kiddie porn was permitted on Gab. After Pittsburgh, they have some new rules. But the same “100% free speech” outlook (to save $$ on moderators) allowed “virtual” (legal???) kiddie porn to flourish there.
The “block” function only hid the cancer, and allowed it to grow and flourish unseen by most (probably like you.)
If you still don’t believe me, I can start posting examples for your education.
A few years ago, a guy was put on trial for having child pornography. What they had was a ‘journal’ of fictitious sex he wrote for his own amusement and no one else had ever seen. I don’t remember how the trial ended.