Taxes for non-residents in Gabon

fmohadi wrote:

Hi
I am in the process of working in Gabon. Appreciate if you can give me an idea on local taxes for expats working on a rotational basis in the oilfield.

Unless your contract states otherwise,your employer should be taking care of taxes for you. In my 40+ years of working in different countries my employer has always been responsible for paying my taxes.
If you are unfortunate to have to pay tax then ask the company what the tax rate is.