i tried this combo but with a jardinii which is supposed to be an agro fish
and the giant gourami was fighting the jar, giant gouramis are aggressive fish, i dont suggest it.
i have seen a guy on here, he put a gg in with a silver, and next day or something the gg ate both the eyes of the silver.
posted a photo too! no eyes
died few days later.
ggs are actually really nasty fish. unless your tank is large enough witih some hiding spots
i find that fish go by line of sight, out of sight out of mind