This is sent by the server and used to display a gump.

Offset Type     Name             Description
------ -------- ---------------- ------------------------------
 0000  BYTE     cmd
 0001  USHORT   size             the size of the packet
 0003  UINT     player           serial of the player
 0007  UINT     serial           serial of the gump
 0011  UINT     top              The x position in pixels at which the gump will appear
 0015  UINT     left             The y position in pixels at which the gump will appear
 0019  USHORT   length_data      
 0021  CHAR[]   data             0x00 terminated
       USHORT   lines            number of textlines in the gump
       loop
       {
       USHORT   length
       UNI[]    text
       }