I’ve kept a single GBR in a community before but he was a meaner GBR so I had to sell the female. He lasted over a year until ich got most of the tank a while back. I rescaped and went with 5 millennium rainbow fish, 8 black skirt tetras, around 10 otocinclus, 2 bamboo shrimp and a half banded spiny eel in a 55 gallon. After they settled for a while I just really wanted to try a pair of GBRs again. Have had them for a bit and they get along great. The female has some ego and chose my sword as her territory and the male is pretty friendly, has great color, long fins and has grown quickly but his mouth is slightly off to the right lol. He eats fine so I think it’s something from birth I just think it’s funny.