This is so much bullshit. I've been following solar weather for quite a few years. They only know a day or two in advance if a solar flare is going to dump a lot of energy towards earth.

One of the biggest in recent history was March of 2012

https://science.nasa.gov/science-news/science-at-nasa/2012/22mar_saber/

March 22, 2012: A recent flurry of eruptions on the sun did more than spark pretty auroras around the poles. NASA-funded researchers say the solar storms of March 8th through 10th dumped enough energy in Earth’s upper atmosphere to power every residence in New York City for two years.

GPS Survived it

https://www.gps.gov/news/2012/03/solarstorm/

The solar storm that occurred in early March 2012 disrupted satellite communications and forced airlines to reroute some flights. But so far, no major GPS problems have been reported as a result of the event. The U.S. network of Continuously Operating Reference Stations (CORS), which monitors GPS daily from over 1,800 locations, observed only slight changes to GPS reception in some parts of Alaska on March 7 and 9.

Space weather

www.spaceweather.com