The 17-year-old male on Thursday made a brief appearance at London's Old Bailey Court confirming his name, date of birth, address and British nationality.
The judge ruled that neither he nor the victim be named.
Police were called to the gallery on Sunday after the boy - a French national visiting London with his family - was found on a fifth-floor roof. He was airlifted to hospital where he remains in a critical yet stable condition. He suffered a brain haemorrhage and fractures to the spine, legs and arms.
Police say there are no links between the suspect and the victim and are calling for witnesses to come forward.
The popular central London museum's viewing platform, overlooking the River Thames, is a highlight for many visitors.
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