here are some useful command you can (may want to) use :
BlocksYoureLookingFor = find_system(gcs,'BlockDialogParams','MyDlgParams')
% or use it with another switch to find your filter block, like
% BlocksYoureLookingFor = find_system(gcs,'BlockType',....)
% now get the line handles of that block,
YourBlocksLineHandles = get_param(BlocksYoureLookingFor(1),'LineHandles')
% note that there may be more than 1 block found.
% here's how you can find the name of the inport line of the block:
Line_name = get(YourBlocksLineHandles.Inport,'Name')
% here's how you can change the name of the inport
set(YourBlocksLineHandles.Inport,'Name','YourFavouriteName')
