there are several groups called that, all based (imaginatively, probably not much real connection) on an early 20th century/19th c group that has not been around for years.
The most 'well known' group now is probably Hermetic order of the golden dawn, Inc.
I've been following a lot of these different HOGD groups exploits on wikipedia. each group has some fanatical fans and it has lead to court cases over who can use the name, and now on wikip there are occasional legal threats between them, and attempts to delete or deprecate each other.
Has someone you know had problems with one of these groups, or were you just curious?