The antenna ANT-MPANEL9-N can be used but is not recomended because it is optimiced for GSM and it is a sectorial antenna.
For a gateway you need a omnidirectional antenna like Taoglas OMB.868.B05F21
Only if you have a really high point (because you can tilt down antennas) and/or need a really efficient gateway (because you have 6x capacity and 3x sensitivity), you can choose a gateway like this with 6xSX1301 for dual polarization and 3 sectors.
http://www.link-labs.com/product/lora-basestation/
This gateway must be used with three sectorial antennas like this:
http://waviot.com/product/waviot-3x120-degree-16dbi-sector-antennas