Quantitative T2-MRI with has a plethora of clinical applications. Current quantitative T2-MRI techniques encode T2-information into the signal magnitude. In this work, a novel method encoding T2 information into the gradient echo signal phase is proposed. With certain RF phase, a heavily T2-weighted signal phase is created. The signal phase has a mild T1 dependence that can be corrected using a spoiled gradient echo magnitude signal. Feasibility in phantoms was demonstrated, as well as in vivo 3D T2 mapping of the abdomen. The proposed method has the potential to be developed into an accurate and robust T2 mapping technique.