It is not international (so it's not made up of standardised international gestures, it's not Gestuno, nor International Sign)
It is not based on English and it is not an invented language: so it is not Signed English, fingerspelling, Paget Gorman, Cued Speech, SEE (Signed Exact English), Sign Supported English (SSE) or Seeing Essential English.
It is not a limited system such as Makaton, which has only a small range of signs.