We present a comprehensive unification framework for gravitational and electromagnetic interactions based on scale-dependent electro-mass, grounded in the generalized uncertainty principle and quantum geometric corrections. This work rigorously addresses previous theoretical gaps by providing explicit physical justification for scale transformations, incorporating quantum uncertainty corrections in spacetime metrics, and deriving testable numerical predictions. The theory demonstrates that gravitational and electromagnetic forces are different manifestations of a unified geometric structure, which appears bifurcated only due to scale-dependent effects. Our approach requires no additional spatial dimensions and makes specific experimental predictions distinguishable from both general relativity and quantum electrodynamics.