What large pancake house franchise has it's headquarters in an unicorporated part of Gwinnett County, Georgia?
Pancake house:  Many small, independent pancake houses, as well as large corporations and franchises, use the terminology in their establishment names, most notably the International House of Pancakes (IHOP), Waffle House and The Original Pancake House. Waffle House:  Waffle House is headquartered in an unincorporated part of Gwinnett County, Georgia, near Norcross.
Waffle House