Can this GPT actually write a fundable grant proposal?
It can produce a structurally sound first draft that hits all the required sections — executive summary, needs statement, project description, budget justification, evaluation plan, and organizational capacity. Fundability, however, depends on the strength of your program design, the evidence base you provide, and how well you tailor the proposal to the specific funder's priorities. The GPT provides the chassis; you provide the engine.