An offensive defenseman by trade, Gilmour helped the Terriers score nearly 90 more goals during his sophomore season while also keeping the puck away from his net.
Gilmour continued to improve as a junior, increasing his point total and pushing Boston University up to 27 wins, setting a new program record.
BU was the top-seeded team for the ECAC Tournament and the Terriers finally managed to reach the championship game, however, they were stymied by Cornell 3–4 and had to settle for the runner-up position.
The team was able to avenge their loos a year earlier by defeating Michigan State in the semifinal and reaching their first title game since 1950.
When the WHA was founded in 1972 Gilmour became a scout for the New England Whalers for a couple years and he later served as an assistant coach for the Cornwall Royals.