CNN is late in reporting this - by a few weeks as usual 
Gambia's president is a quack and a dangerous one at that. The problem is not his "cure" which simply won't work, but this part of his procedure (Source)
What he offers them is a herbal tea and some bananas which he claims he has scientific evidence that it will cure AIDS if they don't use proven medication - oh and for his evidence:
My favourite account of this is from a German magazine from a few weeks ago (Spiegel online)

Gambia's president is a quack and a dangerous one at that. The problem is not his "cure" which simply won't work, but this part of his procedure (Source)
"The Gambian leader requires patients to cease their anti-retroviral drugs (ARVs), a move that risks weakening their immune systems and making them even more prone to infection," said Dr Antonio Filipe, head of the World Health Organisation in Senegal.
What he offers them is a herbal tea and some bananas which he claims he has scientific evidence that it will cure AIDS if they don't use proven medication - oh and for his evidence:
But the Senegalese hospital contracted to handle the test results of Jammeh's nine "recovered" patients has rubbished his conclusions. "There's no baseline," says Dr Coumba-Toure Kane. "You can't prove someone has been cured of Aids from just one data point. It's dishonest of Gambia's government to use our results in this way."
Jammeh retaliates: "There are bound to be sceptics. Mine is not an argument, mine is a proof... I can cure Aids and I will."
If Jammeh has found a cure for Aids, he must share the secret with mankind - and update his CV where, under Special Skills, it says he can cure epilepsy and asthma, but nothing about Aids.
My favourite account of this is from a German magazine from a few weeks ago (Spiegel online)
Now he has gone a step further. A few weeks ago, Jammeh summoned his followers and a few ambassadors, dignitaries and TV reporters to announce in a garbled address that, having made some fantastic discoveries, he is now capable of curing AIDS (as well as asthma). The president admitted to his astonished audience that the therapies still had a few limitations -- he could only cure AIDS on Thursdays. Asthma, on the other hand, could be treated only on Fridays and Saturdays.
(...)
International aid organizations are horrified to find that thousands of infected Gambians are hoping to be treated by the president. Jammeh says he'll heal anyone, young or old. He won't take payment, but he does make one stipulation: those who are taking anti-viral medication must stop doing so immediately. Two respected HIV/AIDS experts promptly handed in their resignation in protest.
Dressed in white from head to toe, the head of state stands before his patients, mumbling prayers and waving the Koran. Then Jammeh rubs green glop on their skin, sprinkles them with gray liquid from an old Evian bottle and gives them something yellow to drink. Bananas -- administered orally -- round off the treatment. After repeating the procedure for several weeks, he proclaims the patients healed. All of them. Without exception.
(...)
Jammeh explains that the method, based on the healing properties of seven herbs and Koranic prayers, is "foolproof." While he prefers to perform the healing sessions in public in front of TV cameras, he's willing to grant religious and social dignitaries private audiences.
Critical questions, on the other hand, are not welcome. A British correspondent from the Sky News network suggested Jammeh ought to have his method tested by independent experts. The president snapped back at her: "I don't have to convince anyone. I can heal AIDS and don't have to explain anything." He was visibly flustered by her request to analyze a sample of his herbal mixture. "Not in a million years," was his reply.
(...)
A United Nations representative in Gambia dared to assert that there was no proof of successful healings. She also cautioned the supposedly cured patients not to believe that they're no longer capable of spreading HIV.
President Jammeh responded promptly to these remarks: having branded the UN representative persona non grata, he gave her 48 hours to leave his country -- which she did. In the view of the Daily Observer, her comments had been "irresponsible".
(...)