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The {\gamma} Dor pulsating stars present high-order gravity modes, which makethem important targets in the intermediate-and low-mass main-sequence region ofthe Hertzsprung-Russell diagram. Whilst we have only access to rotation in theenvelope of the Sun, the g modes of {\gamma} Dor stars can in principle deliverus constraints on the inner layers. With the puzzling discovery of unexpectedlylow rotation rates in the core of red giants, the {\gamma} Dor stars appear nowas unique targets to explore internal angular momentum transport in theprogenitors of red giants. Yet, the {\gamma} Dor pulsations remain hard todetect from the ground for their periods are close to 1 day. While the CoRoTspace mission first revealed intriguing frequency spectra, the almostuninterrupted 4-year photometry from the Kepler mission eventually shed a newlight on them. It revealed regularities in the spectra, expected to bearsignature of physical processes, including rotation, in the shear layers closeto the convective core. We present here the first results of our effort toderive exploitable seismic diagnosis for mid- to fast rotators among {\gamma}Dor stars. We confirm their potential to explore the rotation history of thisearly phase of stellar evolution.

The {\gamma} Dor stars as revealed by Kepler : A key to reveal deep-layer rotation in A and F stars