Gourami What type is it? Some (most) get too big for a 10 gallon.
And as I said, other shrimp you could have are cherry and amano, if you have room. How many ghost shrimp do you have now? it sounds like you are fully/overstocked at the moment depending on the gourami and number of fish you have already.
Most gourami require 10 gallons, unless they are honeys, then you may have two, maybe three, depending on your other stock.