We are lifetime Gold with AA and were status matched with AS at the MVP level, not MVP Gold (I think it depends on how many miles/segments you have at the time - we had almost the MVP equivalent, not what you need for AS's Gold).
We were also told to wait until October of the year we did it (we waited) because before October you get the status for the current year, wait until October and you get the status for the rest of that year and all the next.