I've experienced recruitment with two chapters of Delta Sigma Pi, and generally they are looking for about the same things social GLO's are.
They make sure the pnm has at least a certain GPA, they look for leadership, both chapters have also looked to see how out-going the people were, & things like that.
The only thing is that you don't have to 'register' for recruitment, they are generally open recruitment events, and it's nothing like formal rush!
There is no guarantee (sp?) that you will recieve a bid to join Delta Sigma Pi just like there is no guarantee that you will recieve a bid from social GLO's.
I guess it depends on which professional GLO's you're talking about how thourough the process is
