"Hey Gyp (Dig the Slowness)" is a song by Donovan. He based it on "Can I Do It For You", a song by Memphis Minnie and Kansas Joe McCoy. The name "Gyp" refers to Donovan's best friend, Gyp Mills, known then as Gypsy Dave, and is one of many songs that Donovan wrote and recorded as a dedication to his close friends.
Can we infer the following?
Gypsy Dave was Donovan's best friend
Yes