jajab ji it may also be worthwhile perhaps to review the following excellent thread started by Ishna ji which also covers the "Ghar" and "Dar" words,What does the word "Ghar" means in Guru Granth Sahib Ji?
Ghar cannot be associated with Taal since Guru Sahib has allocated Ghar even to a Partaal !re: What does the word "Ghar" mean in Guru Granth Sahib Ji?
The word "Ghur" in SGGS is related to the musical aspect of sabads in different raagas.
Those who are familiar with the music can understand better than common man.
In simple terms Ghur is the reference for the number of tals/beats to be used for singing any particular composition.Ghur is therefore a sort of direction to a musicial for tals.
The idea propounded by Inderjit Kaur ji is not relevant to all raags enshrined in Sri Guru Granth Sahib. This fact raises serious concerns about this idea.