"=" gnus-group-select-group
"\r" gnus-group-select-group
"\M-\r" gnus-group-quick-select-group
+ "\M- " gnus-group-visible-select-group
[(meta control return)] gnus-group-select-group-ephemerally
"j" gnus-group-jump-to-group
"n" gnus-group-next-unread-group