Communal living

[Lija]

Absolutely not! You can't have anyone with crested gecko, including another crested gecko. They are solitary animals, females might be housed together under very close watch, breeding pairs during breeding season if enough space is provided and if they are not fighting. But to place another species is absolutely out of question for so many reasons.
You have a male, thus he has to be housed alone. If his cage mate is another male they are gonna fight... Sometimes badly. if it is a female, you are running into big problems for both if housed together on a full time basis.