You may wish to google.. Iridovirus and Colisa Ialia or "Dwarf Gourami Disease" I have always loved these fish ,but despite providing them with soft ,warm water with zero ammonia,nitrites, and nitrAtes no higher than 20ppm, I was never able to keep them alive for more than a few weeks,months.
Recent research suggests that as many as 22 to 25 percent of these imported fish carry this virus and that it is difficult to treat with any measureable success.
I am not suggesting that this is what is ailing your recent purchase ,just offering some interesting reading if you are so inclined.
Have heard far too many complaints with respect to this particular species for my own comfort and if your tank was larger,, I would recommend the "Pearl gourami" they are much hardier and can live up to ten years with proper care.
Is also reported by some, that the 'Honey Gourami" may not be as suceptible to the afore mentioned virus but I have no first hand knowledge to support this .