PSA: Please don't use GroupMe. It's a proprietary, centralised network "service" that gobbles up all your data. It's also absolute trash and is no more usable than something like Matrix, DeltaChat, etc.
Remember when Google Hangouts removed XMPP support?
Just like that.
@polaris yep - be very very wary. In fact, ignore it.
Pretty cool place for libre software loving nerds to hang out.