Well anyway the whole thing is weird, so my question now is....
Hive account@gtg is the Hive account@gtg.witnesses account yours?

Thank you for bringing that to attentoin.
Of course not. I'm sorry for replaying you late, but I do not really track mentions on Steem, so it's far better to contact me directly on steem.chat, as Gandalf
On Steem I use only Hive account@gtg and Hive account@gandalf accounts.
I wrote post recently about such scam attempts.
It's very important to keep your keys safe.