" . . . I wouldn't call "Black Gospel" music Gaelic/European. When people bring up "Gospel" music they're usually talking about or refering to a certain type of vocal/musical style and rhythmic feeling. Based on that, I would say Black Gospel music is musically "African" . . . ."

Black Gospel music is neither European nor African, it's American, with antecedents from both African and European music. No one in Ghana ever sang 'Swing Low, Sweet Chariot'.
"Coincidence or not, this traditional AfroAmerican folk music possesses features that are found in Islamic African music and hardly at all in other styles."

Which features?

'Grehart Kubik, a musicologist who specializes in African rain-forest music, concludes: "Many traits that have been considered unusual, strange and difficult to interpret by earlier blues researchers can now be better understood as a thoroughly processed and transformed Arabic-Islamic stylistic component. What makes the blues different from African American music in the Caribbean and in South America is, after all, its Arabic-Islamic stylistic ingredients."'

If the blues contains features specific to Arabic-Islamic music, why wouldn't these same elements manifest themselves in Caribbean or South American music? Were there no African Muslims in these regions?