Your maximum tow rating is the lesser of the GCWR or the hitch rating. The GCWR is the weight of the coach plus the weight of any trailer or toad. In this case you have a maximum GVWR of 31,300#. This means the maximum the coach can weigh including the tongue weight of any trailer. For example if you are at your GVWR of 31,300# and you are towing a 10,000 trailer you would be fine as long as the 1,000# tongue weight is included in the GVWR and your receiver hitch, ball etc. are all rated for 10K.
There is another factor to note and that is the harder you push your equipment the shorter the life of the equipment. Also, the terrain you plan on traveling over is important. If you are traveling over high mountain passes and you are constantly at your max ratings you will shorten the life of your unit's drivetrain.
Bottom line based on the information provided and assuming you have a 10K rated hitch you would appear to have a tow rating of 10K