McGill began playing guitar after her father witnessed her pretending to play guitar with a pool stick, causing him to enrol her in private lessons aged 12. In an interview with the Denver Post, McGill's mom recalled her playing guitar in the style of blues musician B. B. King. McGill went on to attend and graduate University with a degree in music scoring and arranging, but it was then that she noticed that there were limited opportunities in the music scene in Denver. This meant Bibi made the decision to move to Los Angeles where she began playing gigs in small clubs such as The Whiskey and The Viper Room.
In the late 1980s, McGill was a part of a Christian metal band called Ezra. In 1988, they released a demo titled The Choice. In 2001, she was hired by Pink for her promotional tour and appeared with her on Saturday Night Live, The Tonight Show and Top of the Pops - among others. Along with this she appeared in Pink's music video for Don't Let Me Get Me. From the years of 2003 to 2005, McGill toured with the Chilean Rock group La Ley. It was with La Ley that she was given the opportunity to perform at the Vina del Mar International Song Festival in 2005.
After touring for years, McGill decided to give it all up and live a peaceful life. That was until 2006 when Beyoncé was looking for an all-female band to empower her young female audience. After encouragement from family members McGill decided to audition and later ended up becoming the lead guitarist for Beyoncé’s band, the Suga Mamas.
Playing for Beyoncé gave Bibi some incredible opportunities including playing at the Grammys, the Super Bowl Halftime Show in 2013 and Glastonbury Festival in 2011. McGill was also fortunate enough to play at the White House for Barack and Michelle Obama at a birthday party.
After McGill's last tour with Beyoncé, the On The Run Tour in 2014, she decided to focus on other things that she is passionate about. One of those passions is teaching yoga.