A few issues...first you are over GCWR (obviously). Your truck is rated at whatever number (you say 24,000) based on the braking ability and a few other factors. You are now exceeding the safe rating of your trucks braking ability. Second, you are likely going to be over GRAWR which is a big no-no. Your GRAWR is probably 6500lbs (should be on the black and silver sticker in your drivers door jamb). Exceeding this number could lead to premature bearing failure or even axle failure. The only way to know if you are going to be over this is to hook it up and head to a CAT scale. Third, you are going to be over payload by probably about 1500-2000lbs. Meaning your trucks axles should not have more than 10,000lbs on them and I'm guessing you will be closer to 12,000. Check the pin weight on the trailer. Your payload is likely about 2100lbs or so. That means you, your passengers, and cargo in the bed, bigger heavier tires and wheels, etc and your pin weight cannot exceed that 2100lbs (or whatever your payload is). Your payload can be found on the yellow sticker on your drivers door jamb.
You are into 3500 territory for sure with a trailer that big. Not sure even a 3500 single wheel can even handle that legally. Can it do it? possibly.
When people on here label us as the 'payload police' they comment that 'well no cop will ever stop and weigh you'. Maybe not but I can assure you if there is an accident with serious injuries or worse then your truck and trailer will be scrutinized and your insurance could possibly refuse coverage because of this. Aside from the danger to others on the road we warn members of this because of the potential economic impact this could have. Imagine being sued for millions and your insurance denying coverage. Can't say for sure that would happen but I never want to find out.
Like was said, find a smaller trailer or a bigger truck. If you are towing across town a few times a year you would likely be fine