Can you please,explain Gcat to me? Where did they come from? Where did they go? Where did they come from, Cotton Eye Joe? But seriously Gcat is a mystery to me.

Gcat is the first guardian of the Alpha kids’ universe.  It’s currently being controlled by the Condesce. And in  [S] ACT 6 ACT 6 INTERMISSION 1, we see Gcat with Jane at an ectobiology station implying the Jane created Gcat.