It really is tasty! and compliments the lamb (or turkey) gravy! never tried it with beef gravy...
I just keep adding a little (let it all melt and incorporate), tasting, and repeat til it is just right...
You don't want the gorgonzola to overpower the gravy...
and I also cook the potatos in the pan...
I just remove them...
deglaze the pan with some white wine...
add water or chicken stock & "Wondra" mix...
then add the gorgonzola when the gravy is the way I like it...

I found this trick years ago for leftover Thanksgiving Turkey on an internet site... and I now like it all the time...
everyone always says... Oooo... what's that extra little kick in the gravy?