How does suboxone show up as in a urine test?

Yes it will show up. BUT any attempts to subvert drug screens are usually caught be the test. Suboxone is not generally tested for specifically and does not show as positive for the opiate screen, so if it is being tested for then its % per kilogram might also be tested, and then the subversion would be caught. Plus most drug screens do not test for the drug itself but for the metabolites of the drug after it passes through the body.