-l Make bash act as if it had been invoked as a login shell (see INVOCATION below).

--login Equivalent to -l.

This is an excerpt from the bash manpage. So likely no, this isn't a bad thing and this is just GNOME sourcing your environment variables. You need to tell us how frequent these notification are and when they happen (also what GNOME version you're using as well as which distribution you are using). We can't help you if you don't provide that.

No idea why GNOME is giving you these notifications but it may be a Cron task. Check your crontab

Is this when you open a terminal? It tells me stuff like that when my terminal session is done doing something when I didn't have that windows focused

Are you using some kind of IDE application? Or just standard GUI apps?