Meh - good chance it'll work. I've only found three civs so far but all three look open to galleasses + quinqueremes. Better players would be more successful (or, more likely, choose a superior strategy), but the galleass rush seems to be working mostly as intended. Reached Compass on Turn 98 with only two detours (Mining and Masonry). Used Great Library for Drama and Poetry because I was researching Philosophy at the time (in case someone beat me to the GL). Completed the Oracle on Turn 91 to open Exploration (coastal hammers policy soon thereafter). No army yet of course (but still practically at the top for army score) - plan is to build some galleasses and then set sail. Not sure of the first target. Oda has the Statue of Zeus and Great Lighthouse (and Stonehenge, I think), so he'd make a good target. He was recently the top military, so he also has a few units that might be useful for training the galleasses. However, we have a lux/lux trade and I'm pretty far from the exploration happiness policy.
If I were to attempt this strategy again on this map, I wouldn't have built libraries in my expansions (at least, not as the second build after the monument). Both expansions have early flaws (lighthouse needed to correct), so it took forever to get through those builds. I was intending to go directly into the National College after the Great Library, but the libraries weren't ready yet (and didn't have Philosophy yet either). By the time I got around to building the NC, it would have only saved a few turns for Compass. Workers, work boats, granaries, lighthouse (when available), and even units would have been better choices at that time.
Initial Builds: scout, monument, worker, settler, settler
Pantheon: Monument to the Gods on Turn 58 (cleared a barb camp for Lhasa)
World Wonders: Great Library (T67), Oracle (T91)
Social Policies: Tradition, Honor, Aristocracy, Warrior Code, Military Tradition, Exploration, Maritime Infrastructure
Screenshots (all Turn 100):
Overall EmpireCarthageUtiqueHippo RegiusDemographics