Hot Gas Defrost GE Frost Guard Refrigerator
Yes this IS a HGD ref, and while the first GE Frost Guard refs did have serpentine evaporator coils in the top of the Fresh Food section this feature had nothing to do whether the freezer section was defrosted with hot gas, resistance electric heaters, or most often just manually defrosted.
GEs first bottom freezer Frost Guard refs [ 1958 or 9 ], their first top freezer FG refs approximately 1960-63 and their first upright FG freezers 1960-63 were all hot gas defrost.
The GE ref for sale is one of the very desirable 34" wide foam insulated FD models. When GE introduced this ref they jumped ahead of Frigidaire in refrigerator design at least 6 years and ahead of Whirlpool about four years. GE continued to make this refrigerator till around 1970 and I will vote it the best preforming and built of the 1960s, it is one of very few Frost Free refs that is practical to have and use today.