Gamma TiAl has attractive properties for high temperature structural applications. However, a non-protective oxide scale consisting of Al₂O₃ and TiO₂ begins to form in air at temperatures above 700°C. As a result, environmental and thermal protection becomes a concern since oxidation and wear/erosion might limit the maximum service temperature. In this paper, preliminary results of three oxide coatings, namely Al₂O₃, yittria stabilized zirconia (YSZ), and CeO₂ on the development of oxide scale on gamma TiAl sheets are presented. These coatings were applied on gamma TiAl sheet surfaces in the form of nanostructured coatings synthesized by sol-gel and micro-emulsion techniques. This was followed by thermal exposure in air at 900°C for 20 hours. The development of the oxide scale on the gamma TiAl substrate was studied by a combination of optical, scanning electron microscope, EDAX and XRD methods. In all cases, an adherent oxide scale was formed adjacent to the gamma TiAl substrate. It was found that among these three nanostructured oxide coatings, the CeO₂ coating yielded the lowest oxide scale thickness on the substrate. Microstructural similarities and differences in the oxide scales on the coated and uncoated substrates will be discussed.