Gabriel D. Bobrow, a District of Columbia businessman whom U.S. officials have linked to narcotics and organized crime figures, was found dead in his Northwest apartment yesterday, apparently a suicide victim, police said.

Alerted by a neighbor who reported hearing a gunshot, police found Bobrow shot through the head in his ninth-floor apartment at 2130 P St. NW. A revolver was found near the body, police said.

Capt. Arif Mosrie, head of the homicide section, said police are considering the death of the 45-year-old Bobrow to be self-inflicted, but because of his background, "we are investigating it thoroughly."

Bobrow was sentenced in 1972 to six years in prison for possession of concaine and possession of marijuana with intent to distribute. At the time, federal drug enforcement officials described him as close to two of the area's top 10 heroin wholesalers.

Bobrow once managed the Washington Wig Co., at 1224 F. St. NW, an enterprise that had been owned by Joseph F. Nesline. Justice Department officials have said that Nesline is a leader of organized criminal activities in the Washington area. Nesline has vehemently denied these accusations. Bobrow acknowledged a business relationship with Nesline, but denied that Nesline had any organized crime ties.

In 1965, prosecutors here granted him immunity and he testified before a special grand jury investigating interstate gambling allegedly involving Nesline.