No. While the 5Ghz wireless band is sometimes called 5G, it is a different technology to 5G cellular or mobile connectivity. The fact that the two sound so similar is largely coincidental. 5G connectivity is named that because it is positioned as the fifth generation of wireless mobile networks. It was preceded by 4G, which was the fourth generation of mass mobile networking tech, and will eventually be succeeded by 6G. On the other hand, 5Ghz is named after the frequency that is used to wireless transmit data over short distances.