Formerly the Deep Space Gateway and now the Lunar Orbital Gateway or LOPG station, is planned for Expedition 1 aka the maiden launch of the SLS. After reading several specifications, to avoid the "gravity well" of earth the station will remain on a cislunar orbit. Some sources say that the station will be equipped with electric propulsion systems to adjust orbits, around the earth and the moon.
What is a cislunar orbit, and with this sort of orbit, could the station also orbit the earth with minor burns, and how would this work for rendezvous and docking?