This is a walk through of how to change your alias for GroupMe on Android. This does not affect your nickname in existing chats (for that see instructions here), but it does change what people see when they bring up your profile as well as when they add you to new chats, it should use the new alias.
(Some personal info has been blurred out for privacy reasons)
You can also find similar info on the GroupMe website.
From a Chat Room
From a chat room, you need to get back to the chat list screen.
Click the arrow in the top left corner.
From the Chat List
From the chat list screen, you need to bring up your settings.
Click the three horizontal bars in the top left corner
From the Settings Screen
From the settings screen, you need to bring up your profile
Click on the blue face/person area
From Your Profile
From your profile, you need to go into edit mode
Click the word “EDIT” in the top right corner
Then you are in edit mode
Where you can change your picture, email, or alias. Now click on your alias
And it will pop up the editor, so you can change this to your game name and squad/level.
When you are done, just click the check mark in the top right corner