they do. also CNY/JPY/CHF. but you can't wire USD and then see USD in your balance. you wire USD, it appears in your balance as GEL, and then you yourself need to convert it into the USD sub account
USD wires sent to that IBAN will arrive in your account as GEL. They will not bypass the GEL balance and go straight into your USD balance. From what I've seen the only way to bypass the initial GEL conversion is to physically bring physical USD notes into a branch inside Georgia with your own hands.