If I get banned on the PC will I get banned on the Xbox One as well, GTA V

As it has been pointed out in the comments, you will not get banned if you play the game legit.
If you've transferred your character to the PC, your stats, achievements and progress will be separated and will not be affected by each other.
However, if you find yourself banned, all accounts linked (via Rockstar Social Club) will be banned too.

You can still appeal a false ban, so IF you get banned, just contact Rockstar Support (They're not as bad as everyone says!), But alot of "False Banned" players either exploited, glitched or modded. So you shouldn't worry if you just play the game how it was intended.