No visa is required for Ghanaians travelling to Kenya.

Source: http://evisa.go.ke/eligibility.html

ARRIVAL

Visitors need to fill the arrival form and show yellow fever card to airport health officers

Simple! Once the immigration officer stamps your passport, you are allowed to stay in Kenya for 3 months. Free or paid work is not permitted.

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Other nationals can find their eligibility for the Kenyan eVisa here.

Note: Immigrations laws change. For African countries, it is very likely not to have change in visa policies recorded on their immigration websites. It is recommended to email or call the embassy/consulate. Airlines may also have up to date visa info.