I have a red honey gourami (not sure if it's the same as your species, perhaps) and she is a pig!
Eats just about everything, flakes, pellets, sinking wafers, algae wafers, some algae, freeze dried blood worms and brine shrimp. I find that my gourami is constantly eating and naturally excreting, just like my Oto catfish.
Male gourami's like floating plants for bubble nest making. Unfortunately, I have a female so I've never seen it done, though, I've seen a betta make one. Keep the surface agitation to a minimum so it doesn't destroy the nest.
My gourami likes to explore the whole tank. I have a planted tank so she gets her face into every nook and cranny, she's contort if she has too. She'll find food wherever it may be whether it be on rocks, driftwood, plants, or equipment.
Gourami's are very interesting!
RoK it looks like you have a cool tank there...