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GaN has recently been shown to host bright, photostable, defect single-photon emitters in the 600–700 nm wavelength range that are promising for quantum applications. Our studies have revealed the optical dipole structure, mechanisms associated with optical dipole dephasing, and the spin structure of these emitters. We have also discovered optically detected magnetic resonance (ODMR) in two distinct species of defects. In one group, we found negative optically detected magnetic resonance of a few percent associated with a metastable electronic state, whereas in the other, we found positive optically detected magnetic resonance of up to 30% associated with the ground and optically excited electronic states. We also established coherent control over a single defect’s ground-state spin. In this talk, we will present our results on the basic physics of these defects and also discuss the spin physics associated with the observed ODMR.