General Obligation Bond - GO

A municipal bond backed by the credit and "taxing power" of the issuing jurisdiction rather than the revenue from a given project.

Investopedia Says:
General obligation bonds are issued with the belief that a municipality will be able to repay its debt obligation through taxation or revenue from projects. No assets are used as collateral.

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State or municipal bond (a G-O bond) backed by the issuer's full faith credit and taxing authority. General obligation bonds are normally issued to finance nonrevenue producing public works projects, such as schools, roads, and public buildings, although some G-O projects do generate revenue, for example, a bond financing a water or sewage treatment plant. A bond having no restrictions as to dollar amount of taxes or tax rate that can be assessed to make debt service payments to bondholders is known as an unlimited tax bond. Often, however, local governments are restricted by local or state regulations limiting property taxes that can be raised to make bond principal and interest payments; such a bond is called a Limited Tax Bond. See also Private Purpose Bond; Public Purpose Bond; Revenue Bond.