Looking at the "CO Facts" 2007 1Q edition PDF, GUM has a typical of 17 daily CO flights and 8 CO Connection for 25 total.

That's behind TPA (57), FLL (47), MIA (36), MCO (32), BOS (29), and ORD (26) for total CO (mainland, regional and connection) flights.

However, with 19 cities served non-stop, that's only behind IAH (178), EWR (157) and CLE (73).