The GH section of the skill test is pretty much the same as the CPL instrument section, if you have a done a CPL?
You will do the following, and does not last very long.
Straight and Level.
Steep Turns using thirty degree bank angle onto specific headings.
Climbing/Descending/Turns onto specific headings, speeds and rates of descent.
Partial panel, climbing and descending at specific speeds. Turns onto specific headings (timed turns).
Recovery from unusual attitudes (nose high, nose low and a steep turn).