hl8548-G EXT_LNA_GPS_EN

Hello,
Thanks! I’m not good at English and try to explain it simply.
I use the command :AT+GPSCONF=1,1.
It means that Internal LNA set to Low Gain and GPS receiver LNA_EN output signal is automatically driven.
What it means? automatically driven.
When does this signal become ‘active’?

I think that GPS receiver LNA_EN output signal is EXT_LNA_GPS_EN.Am I right?