Is this GPA on par with other high performing students in your high school? On the surface, your AP scores, SAT scores , publications etc, don’t seem to be in line with this GPA, so you may need to provide some context for this. UMD does look heavily at GPA.
Also, UMD has a mandate to favor in state students. So it’s somewhat competitive for OOS students. And CS is an Limited Enrollment Program there , and so you will want to apply by their EA deadline.