I’ve spawned neon gobies about a year ago. Unfortunately my female passed away before I was able to raise some of her babies. This pair of gobies was just two random fish bought from the local fish store and I got lucky enough to get a pair. I currently have a pair of sharknose gobies, however I cant confirm if they are spawning at all. I’ve found no eggs, yet they have been together for months.
For anyone who's interested in spawning and rearing cleaner gobies, i would suggest reading The Complete Illustrated Breeder's Guide to Marine Aquarium Fishes