The HGA is a very personal thing. I have a familiar and I often do get spirits that act as a temporary guide for me, But none of them has the intimacy and consistency of an HGA..
In the last year I have been invoking him and I think I have managed to meet him a couple times in lucid dreams and meditations.. Once it happened while skrying over the tarot cards that spell the word Adni, the second more recently: I saw the same awesome guy as Saturn in a lucid dream I had after having meditated over the planetary force of Saturn as part of my magical routine..
I am very attracted to him but he never speaks to me: he shows me things instead..
So I guess I am at the stage of the Vision of the HGA but I don't know his name yet and definitely I don't have a clue on how to make contact to him.. I mean I see him when he appears, not when I ask for it..
But it's a start and he had me make a massive step forward in practical life if nothing else..
I wish I get closer to him..