You need an ETA for Kenya if you have a Ghanaian passport

Travellers must obtain an Electronic Travel Authorization (eTA) to visit Kenya for Tourism. Travellers can submit the eTA application online. Once the application is approved, travellers receive their eTA confirmation electronically. A valid eTA is required to board the flight. If the eTA is expired or doesn’t match the traveller’s passport information, travellers will not be able to board their flight. The Kenya eTA is only valid for a single entry, except for in cases where travellers are visiting Burundi, Democratic Republic of Congo, Rwanda, South Sudan, Tanzania, or Uganda immediately after visiting Kenya, do not visit any other countries before returning to Kenya, and their Kenyan eTA is still valid upon return. Travellers fulfilling those conditions can use their eTA to return to Kenya.