Lake County Judge Christopher Stride told Marni Yang as he sentenced her Friday that "the methodical, meticulous and maniacal manner" of her crime made it different from other murders.
A jury found Yang guilty in March of the October 2007 murder of Rhoni Reuter and Reuter's unborn child. Reuter was shot six times, and two of the bullets struck the baby.
Prosecutors accused Yang of carefully planning the execution of someone she viewed as a rival for the football player's affection.
Gayle was a member of the Bears' 1985 Super Bowl team.