Hakeem Olajuwon averaged 6.1 blocks per game when playing 10+ games in March 1990.

who was the last player to have 6 bpg in a month with 10 gp in that month
Interpreted as:
Who was the last player to have 6 or higher bpg in a month with 10 or more gp in that month?
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March 1990OlajuwonFebruary 1990RobinsonJanuary 1986BolDecember 1985BolFebruary 1985Eaton6.16.36.86.46.6
NAMEMONTHGPBPGMPGPPGRPGAPGSPGTPGFGMFGAFG%3PM3PA3P%FTMFTAFT%MINPTSREBASTSTLBLKTOVPF+/-
Hakeem OlajuwonHakeem OlajuwonMarch 1990166.140.826.015.33.82.83.910.020.848.20.00.10.06.07.679.36534162456144986366
David RobinsonDavid RobinsonFebruary 1990136.337.924.712.42.21.82.98.616.253.10.00.07.59.479.54933211612923823839
Manute BolManute BolJanuary 1986166.833.24.16.90.30.40.91.74.537.50.00.00.71.161.153165110561091460
Manute BolManute BolDecember 1985136.428.94.26.80.40.20.81.73.253.70.00.10.00.81.647.6376548853831049
Mark EatonMark EatonFebruary 1985136.638.512.713.01.70.52.74.910.546.70.00.02.84.268.5501165169226863545
StatMuse has game-level data for blocks per game going back to the 1983-84 season.