Characters and Motion Prerequisites
A detailed description of the prerequisites on characters skeleton/geometry and motions can be found in the Reference Guide.
You should take a look at it before starting creating your own characters or motions
Taking a look at the conversion tutorials can also help you to better understand how to create the best possible assets for Golaem
Last, but not least, if you are importing characters from a provider or from 3dsMax, you should check the Importing 3rd Party assets section for dedicated advice.