During a breeding season, female crested geckos will lay a clutch of two eggs every 30 to 45 days. When a gravid female is ready to deposit eggs, she will seek out a moist place in which to do so. An egg-laying box in her enclosure will allow you to keep track of the eggs and remove them easily.It can be a plastic container approximately 8 inches long by 5 inches wide by 5 inches tall, filled to a depth of 4 inches with moistened sphagnum moss. Kimberly Lucas. Two crested gecko eggs rest on moss.If you notice the female digging holes in the moistened substrate during the evening, check the following morning to see if the substrate appears packed down, and if the holes are covered-both are good signs that the female crested gecko has deposited her eggs.n egg-laying box in her enclosure will allow you to keep track of the eggs and remove them easily. It can be a plastic container approximately 8 inches long by 5 inches wide by 5 inches tall, filled to a depth of 4 inches with moistened sphagnum moss. Kimberly Lucas. Two crested gecko eggs rest on moss.