Servers by jDrones

Is It True That Using 1.2 GHz VTX Will Interfere GPS signal? Need Advice Please

Hello guys, I need to do long range Surveillance (with Real Time Video Tx.) about 20-30 km within hills and mountain area. So this is a BLOS mission. Unfortunately in that area there is no internet/cellular signal available. To my knowledge the proper way is to use 1.2GHz Video TX with 5-10watts power output (or using expensive digital VTX system). But I read somewhere that this 1.2GHz strong signal from the VTX will interfere GPS reception. Anybody can advise me how is the best way to do this is?? Thank you.

Servers by jDrones