Is the B5 Lite capable of GPS sync (or going to be capable in future on current hardware)?
There are no current plans to equip the B5-Lite product with an internal GPS receiver because the product was designed for low cost. The alternative is its big brother, the B5 or B5c.
However, the B5-Lite is capable of receiving timing information as a TDMA client when associated with another GPS-capable Mimosa radio such as a B5c in PTMP configuration. Firmware to enable this is currently in closed beta.