Not quite. This gun [with a 60km/36 miles range]
Not this one [M777, range circa 30-40 km (assisted), 22.5-30 km (unassisted)]
There is, however, a nifty design workup of a wheeled SP versiuon of the M777, based on a Marine LAV/Stryker 8-wheel chassis- though it's likely not amphibious like a LAV.