A gutter apron is a bent piece of flashing that tucks under shingles and over a gutter. Gutter aprons typically come in 10 foot sections and you might need roll flashing if you have a drip edge. 1.

A. Typically the metal drip edge that is installed below the first course of shingle extends out enough to have the water drip straight down into the gutter. I have seen the drip edge installed ...

Not sure what kind of gutter brackets you have, but the most cost-effective solution would be to have strips of aluminum cut and fastened up under the drip edge and extend down over the back edge ...