How can I license music by Jon Gilbert Leavitt / JGLSongs?
Music can be licensed through the companies (links on right)::
Freeplay Music - Rock Grooves Vol. 8
Freeplay Music - Dreamscapes, Vol . 10
Getty Images Music
My Music Source
Amurco (inquire within)
or you can reference the entire song catalog through ASCAP (by searching "Jon Gilbert Leavitt" in search field)