The metal-organic framework perovskite analogue guanadinium copper(II) formate has achieved considerable recent attention for its multiferroic properties and consequent potential applications. There is a tetragonal coordination geometry about the Jahn-Teller distorted Cu ion, and as a result the material is known to exhibit 1D magnetic correlations along chains of short Cu-OCHO-Cu bonds. Since there can be no long-range order in 1D systems at finite temperatures, however, magnetic Bragg scattering is insufficient to characterise the magnetic structure of this compound. We therefore propose a total scattering study in which we will use pair distribution function (PDF) analysis to probe the local magnetic correlations as a function of temperature. We will cool the sample and watch as correlations grow in one and then three dimensions, and finally as long-range order sets in.