Making it illegal in eg Europe to financially support homophobic organizations would reduce their worldwide money supply, and in the long term help their victims in all countries, including Ghana.
There are no homophobic organizations in the country. You don't need people going around stoking hate flames. There are no hate flames to stoke, just people not wanting to see the abnormal. You don't address that with economic sanctions (which seems to be the go-to whip of so-called developed countries). It just won't work.