When you googled red honey gourami you would have found hits written by people who believe that there is a red colour morph of honey gourami. That does not mean it's true, just that it's what the person who wrote it thinks. This is why we need to be careful about what we read on-line - just because someone says something in a website does not necessarily mean it's true.
There is controversy over red honey gouramis aka red robin gouramis. I had one years ago and it grew significantly bigger than true honey gouramis, which makes me think it was not 100% honey, or even a honey gourami at all.
If I have read other threads correctly, these fish were in a 10 gallon tank until it was recently upgraded, so it may be a larger type of gourami which could not reach its potential in a small tank. It could start to grow now it's in a bigger tank.
Edit - I have just found this comment on Maidenhead Aquatics website (Maidenhead Aquatics is a national chain of fish stores in the UK) in their profile of honey gourami.
"You may also see fishes confusingly labelled as Red honey gourami - these are a different species, the Red robin gourami, which is a variety of Thicklip gourami (
C. labiosa) and can be found elsewhere on the databank."
They also have a profile of this fish
Expert facts, care advice, feeding tips and breeding information about the Red Robin Gourami (Trichogaster labiosa var.) for freshwater aquarium enthusiasts.
www.fishkeeper.co.uk