[PLUG] question on obtaining the PID numbers of a batch command and finding out when a batch script has successfully terminated

[American Citizen]

To all:

I have a simple batch file which has 6 CLI commands to it
gp -q < xaa > xaa.results &

gp -q < xab > xab.results &

gp -q < xac > xac.results &

gp -q < xad > xad.results &

gp -q < xae > xae.results &

gp -q < xaf > xaf.results &

When I do a simple "% bash do-x.sh" which is the bash script, it runs 
normally

but due to the redirect commands, doing the "ps -fx" will only return 
the gp command (along with all live commands the system is running) but 
I don't know which xaa, or xab, or xac, etc it is associated with.

Is there some way to do a "ps -fax | grep gp" command which locates 
exactly the pids involved? And can these results be returned as a simple 
ascii file, so I can do future inquiries to determine when the program 
has stopped running?

The goal here is to determine when all 6 programs running "gp" have 
terminated.

Randall