As I have commented on MANY occasions. You cannot get banned for GSE. It is totally contained within the confines of WOW’s API or what Blizzard allows a mod to do.
YOU CAN GET BANNED, however this is very unlikely, for using Razer Synapse, AHK, Logitech’s thingie etc for automating keypresses. Toggle style macros that are toggle on/toggle off are more likely to trigger this.
YOU WILL GET BANNED for using Razer Synapse, AHK, Logitech’s thingie etc to bot.
For a more detailed answer see: Bots, Botting and the thin grey line.