Upping their record to 7-2, the Bucs have now played seven home games and won them all.
Greer set the tone in the opener of a three-game series, socking a two-run home run in the bottom of the first inning.
LIU (1-7) made it 2-1 in the top of the second, but the Bucs countered with three runs before the inning was through and owned a 9-1 after their four-run fifth.
Gilbert batted 3 for 5 while Jake Lyle, Cullen Smith and Colby Emmertz each added two hits to a 13-hit ETSU assault.
Smith scored twice, plus he smacked a two-run single during the fifth. Gilbert, Lyle, Emmertz and Ethan Cady all doubled.
Kaczor (2-0) yielded just one run and four hits over 6 2/3 innings. He and Trey Oglesby, who threw the final 2 1/3 frames, combined for 11 strikeouts (Kaczor 6).
Limited to five hits, the Blackbirds got a two-run Alex Briggs homer in the eighth. Colin Adams went 1 for 2 and drew a pair of walks.
Anthony Rupp turned in a quality showing in relief of starter Zach Pederson, allowing one unearned run over 3 1/3 innings.
The Bucs and Blackbirds next meet up for a Saturday doubleheader, with action set to begin at noon. The teams were slated to play single games on Saturday and Sunday, but inclement weather is expected for the last day of the weekend.