I have used the phrase "genetic migration" about myself on numerous occasions over the past couple of years. Midlands born and bred, yet from about the age of ten I was convinced that my future lay in London, for no specific reason. Deep roots going back centuries in specific villages or suburbs of Nottingham. Vague awareness that one branch of the family had something to do with Rugby (the place, not the sport).
I moved to the English capital aged eighteen to go to university and never went back. Came to feel somewhat disloyal as the years went by - that my home town had never been 'good enough' - yet I felt entirely at home in my adopted city.
Two years ago, teetering on the edge of my sixth decade, I discovered that there are two 'London' branches of my family: one [paternal] in south-east London (where I lived for 25 years) and another [maternal] in north/north-west London (where I've lived for the past eight). Neither were known about in my living family.
The maternal branch has been particularly startling in the coincidences that I've discovered. Won't go into detail here, except to say that it has felt like my ancestors have been stalking me. I moved further out into the suburbs a couple of years ago, only to discover that the descendants who didn't make their way up to the Midlands also ended up in this particular suburb. I can see the house where they used to live from my lounge window. Over 100 miles from the place where I grew up, this is odd. (And nice.)
And outside of London, or the Midlands, two of my favourite places of the past couple of decades have been Margate and Newcastle, where it turns out the paternal 'London' branch of my family originated from.
So I'm convinced that genetic memory is a thing. Doesn't have to be pseudo-science. Some kind of subconscious tuning-in to magnetic fields, light levels, degree of ions in the atmosphere, hardness in the water, etc. There are plenty of potential markers that the human body could pick up on, if we allow for a greater level of sensory awareness than we can currently explain. How the 'memory' gets passed down, I have no idea. But I wouldn't discount the possibility of some kind of mechanism.