Conversation so far:
What does the word proper' symbolize in relation to the band Gong?
They were approached by Jean Karakos of the newly-formed independent label BYG Actuel to record an album, and so set about forming a new electric Gong band.
Did something specific happen to Gong during 1969-1971?
The re-born Gong played its debut gig at the BYG Actuel Festival in the small Belgian town of Amougies, on 27 October 1969.
Did the band Gong ever do any films during their proper beginings?
Film director Jérôme Laperrousaz invited them back to France to record a soundtrack for a motorcycle racing movie. This came to nothing.
Were there more gigs for Gong during 1969-1971?
The band, Gong's Magick Brother was released in March 1970.
Were there any other releases from Gong during 1969-1971 besides Magick Brother?
Camembert Electrique is the second studio album by the progressive rock band Gong, recorded and originally released in 1971.
What happened to Gong in 1971?
Houari left the band in the spring of 1971 and was replaced by English drummer Pip Pyle.
How many band members were there in Gong during the proper beginning of the band?
The band, Gong's personnel are Daevid Allen, Gilli Smyth, Didier Malherbe, Christian Tritsch, and Pip Pyle.

Question: Did anything else big happen during those years?
Self-contained rewrite: Did anything else big happen to Gong during their early years, besides the lineup changes?