Taxes are levied by the taxing authority (city, township, ....) where the property is located. For the G.R. area information can be located at http://www.accesskent.com. Most of the governing bodies (city, township, county,...) have websites where you can access the public records.
Here are direct links to the pages on my website that discusses property taxes. They lack much information about the east side of the state however (although the calculations are the same):
Associate Broker, ABR, CRS, e-PRO, GRI
616-248-0000 Direct Office
866-559-4373 Direct Fax