Gebser along with Teilhard arrived independently at many of the same conclusions as did Sri Aurobindo regarding the evolution of consciousness.  Gebser work The Ever Present Origin is IMO one of the masterpieces of the last century.  When he came to know of Sri Aurobindo , he saw in him the concrete realization of  his own highest ideals. Recentlly it was revealed that he has communication also with the Mother, and here is what he says about her:

HERE'S AN INTERESTING NEW TRANSLATION OF A LATER BOOK
BY GEBSER AFTYER VISITING INDIA IN THE 70S:

"Sri Aurobindo died in 1950, as did Sri Maharshi, but
his radianting spirit lives on with his asharam.
Since his death this ashram has been guided and cared
for by Mrs. Mira Alfassa, "the Mother," who over many
decades has been the beloved student and co-worker of
Sri Aurobindo.  Her personality differentiates itself
from the saintliness of Sri Sri Anandamayi-Ma in some
fundamental ways because in contrast to "Ma" she has
become conscious in certain manners that at first only
Sri Aurobindo had been capable of.  She was born a
French woman.  Today, well into her eighties, she is
an imposing and extremely forgiving personality who
has at her disposal perfectly extraordinary abilities.
 Her brightness and clarity, which I myself have had
occasion to experience in two conversations with her,
in which she extended her protection to me convinced
me that she was genuinely learned and trained in a
greater discipline and she had something unlocalizable
and was visibly living through the realms of soul and
spirit, that she scarcely lives through the human body
anymore, but as one radiating from a conjoined
spiritual power. She furthers the teachings of
Aurobindo to the young, a teaching, which has been
integrated through India and is coming to the West and
out of this 'synthesis'  contains the beginning point
for the true resolution of the question of the human."