Tbh I do not want to have to give away fish, but maybe putting him with a juvenile fire mouth could work
You have a chance if it is a solo GT with a solo Jewel, solo Acara etc. The fish usually gets super aggressive when they pair up and it is time to breed. You could also add that Bicher & a Pleco, but will probably have to thin the stocking once they get large. Make sure you have adequate filtration, both mechanical and biological to manage this level of stocking.I hope your pair stays well, I was thinking since GT stay smaller they could be kept with another smaller cichlid like acara or jewel cichlid or maybe a poly. I like polys it’s just that if I did a tank with all polys I will get bored.