200e

All the way counter-clockwise is the standard position for a gate on  
the Buchla or a VCA for that matter. Some budget VCAs eliminate the  
pot altogether so the normal state is the same as turning it all the  
way down. As an aside you can read stories about the Arp Odyssey which  
had a slider. Basically people would push it up, let sound through all  
the time and then claim it was broken. Why have that? Well I love it  
to mix without a 227e or test my connections without a CV signal.  
Practically it lets you adjust the response to voltages in , though on  
a typical VCA you have negative voltages in your system making VCA  
offset essential for bipolar CV, but that's not normal in a Buchla.

For a Low Pass gate the really obvious need for this kind of  
configuration is the Low Pass capability. It's a filter and you need  
to adjust it.

That gets me thinking, well then, why can't I adjust the Low Pass and  
Gate capabilities independently? But the reality is it doesn't work  
that way, though given you have at least 4 LPGs you hopefully have one  
to spare so you can do the LP and the Gate separately on 2 of them in  
series.