I had an STI/UTI test done with both swab & urine. Result show Pus Cells: Moderate (Flag **) and Gram Neg Bacilili: Moderate. Pls what does this mean?

Hard to say. In the absence of a history & exam or explanation of how the specimens were collected, it is hard to be specific. A female squat pee common to some clinics can have such findings be normal. A clean catch would suggest a urinary tract infection. Neither result says anything about STI's. I would ask the doc who authorized the test.