MAN page on Mount (8): translation for explanation of "current process"

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http://www.linuxquestions.org – As both UID and GID maintain they must have an associated value to function, that is the ID of the "current process" by default. Ok, I got that down. Now: all the process ID's I can observe (through System Monitor) have ID-numbers in the thousands. The group number of root is zero and that of "users" is one-hundred. The GID of /windows (on my system) is 46. Why? :scratch: I'm assuming that the number is meant to be in octal, but is there a list that I pull up?... (HowTos)