“A2G” is Gift of Gab’s appetizer to “Alphabet Aerobics” on the A2G EP.

The drum loop is sampled from “I Walk on Gilded Splinters” by Johnny Jenkins. According to Wikipedia, it also samples the following songs:
“Afro Connections at a Hi 5 (In the Eyes of the Hoodlum)” by De La Soul
“Wailin'” by Outkast
“Ya Mama” by The Pharcyde.