Learning about the characters due to appear in Tatsunoko vs Capcom - I got interested in seeing for myself what Gatchaman is all about. The full name of the series is Science Ninja Team Gatchaman (科学忍者隊ガッチャマンKagaku Ninjatai Gatchaman). You can check out some of the episodes through Netflix. The Animation style of the series is truly praise worthy - with a level of detail in faces and atmosphere not even seen in Anime today. The DVD sets are available, showing the series in it's original and unedited condition, both dubbed and subtitled. Some people might know the series by other names, like "Battle for the Planets" and "G-Force" when they where ported over to America through the decades.
The person you should thank for getting the real original Gatchaman brought to America is Comic Artist Alex Ross. He was apparently a big fan of Battle of the Planets and wanted to do a piece based on the property. His interest in the series caught the eye of the license holder - and a series of Battle of the Planets comics and art were produced. Ross' art also appears in the unedited DVDs.
Here an interview I found on Youtube detailing how he got involved in the series. Also below is the opening of the series.
Part 1 of the Alex Ross Gatchaman Interview
Part 2 of the Alex Ross Gatchaman Interview
The Opening of Gatchaman