No! You cannot feed turkey to gerbils at all. There is far too much fat in turkey that it isn’t safe to feed it to your gerbil. It will make them sick.
There is just too much fat in turkey that it will make them sick and possibly cause other health issues.
Therefore do not try and feed turkey to your gerbil. I know it may be tempting especially around the holiday seasons but it is best to avoid feed this food to your gerbil as it will make them sick.