VGF is a government support in the form of contribution of some of the construction cost, given in cash to a PPP project that already economically viable but has not had a financial feasibility. Viability Gap Funding (VGF) Means a grant one-time or deferred, provided to support infrastructure projects that are economically justified but. For the successful completion of such projects, the government has designed Viability Gap Funding (VGF). Viability literally means ability to survive successfully. Finance minister Nirmala Sitharaman Saturday said that government will spend Rs.