How can I link a gallery made with views to another gallery made in views?
If you are looking for using a view into another as a field then you can use Views Field View to achieve this.

Module page describe :


  This module allows you to embed a view as a field in a view. A new
  field handler is made available, so this can also be used in area
  (header/footer/empty) handlers as well as rows.
  
  This view handler can accept arguments from fields of the parent view
  using tokens and pass them into the child view for each row. Raw or
  rendered token values can be used, as well as static values.