Three children and three school staffers were killed in Monday's attack at The Covenant School.
Other artists vying for the trophy are Blake Shelton, Cody Johnson, HARDY & Lainey Wilson and Kane & Katelyn Brown.
Sheryl Crow, Kelsea Ballerini, Margo Price, Carly Pearce, Charlie Worsham and more are speaking out following a school shooting that claimed the lives of three students and three adult staff members.
A teacher at Heyer Elementary tweeted that two rainbow-themed songs were initially banned from the sho.
Miko Marks, Rissi Palmer, Jordana Bryant and more also release new music.
The singer-songwriter scored his first leader as a recording artist on the Country Airplay chart.
"This album is about the stage of life I’m in right now," Combs said.
The event will be held the day before the 58th annual ACM Awards.
Gorley has 12 songwriting credits on the latest tally.
55th anniversary edition to also feature headliners Odesza and James Taylor and his all-star band.
