It's possible that you've observed behavior that mimics mating, but it's more likely to be:
* Social Play: Gerbils are social animals and often engage in playful behavior that might resemble mating, but it's not actually sexual in nature.
* Dominance Display: Gerbils establish hierarchies within their social groups, and sometimes, this can involve behaviors that look like mating but are actually dominance displays.
* Misinterpretation: It's possible that you might be misinterpreting the behavior.
It's crucial to remember that homosexuality is not documented in gerbils.
If you have concerns about your gerbils' behavior, it's always best to consult with a veterinarian or a qualified rodent expert.