I believe the target time frame for having GMS on TC55 KK is mid to end of August.
we've released the Product Marketing Bulletin 2654 to partners with informations about our TC55 Standard configuration with KitKat v4.4.3.
(The "Standard Configuration" of our devices includes GMS).
For EMEA First Customer Shipment is July 23rd, NA/LATAM First Customer Shipment is Aug.12th. I can expect that the final BSP will be published around those dates.
Thanks for your answer! I am looking forward to this date!