  The Gemini Planet Imager is an extreme AO instrument with an integral field
spectrograph (IFS) operating in Y, J, H, and K bands. Both the Gemini telescope
and the GPI instrument are very complex systems. Our goal is that the combined
telescope and instrument system may be run by one observer operating the
instrument, and one operator controlling the telescope and the acquisition of
light to the instrument. This requires a smooth integration between the two
systems and easily operated control interfaces. We discuss the definition of
the software and hardware interfaces, their implementation and testing, and the
integration of the instrument with the telescope environment.
