Gillies has a YouTube account called LizGilliesOfficial, where she uploads covers of popular songs including: "Wild Horses" by The Rolling Stones, "You and I" by Lady Gaga, "For No One" by The Beatles, "Jealous Guy" by John Lennon, "Father and Son" by Cat Stevens and "One and Only" by Adele.
The pair also wrote many songs together for Wilson's 1977 album Pacific Ocean Blue including "What's Wrong", "Moonshine", "Friday Night", "Dreamer", and "End of The Show", as well as "Baby Blue" and "You and I" with Karen Lamm.