How to form a trench in driveway to take stormwater away from entrance of garage?

You could consider installing the item in the link below and connecting it to that storm drain however that would mean digging 2 trenchs 1 for the new drain and 1 for the 4" pvc pipe to run to the drain itself and you would have to have that 4" pipe at a slope of 1/4" every 4' so you would have a pipe with 1" fall over your distance it's something you could try and I'm sure if you look on line there would be videos and other information on how to do this ok,good luck.