The Gear tab is the control center for the additional devices of your imaging kit - Telescope/Mount, Focuser, Filter Wheel, Rotator. If you don't need or don't use a section click on the small button in the upper right corner to collapse it and to save screen space.
Use Shift+Click on the Gear tab button in order to make the tab a floating window. Click on the "x" button or use Shift+Click to dock it back.
Mount / Telescope
Controls the Telescope/Mount. For detailed information see the section Telescope.