Can you explain for what purpose you need suffix.
If it is common use, I'll add in next little release. May be in all extensions.
But I need to know, is it for flexible use, or only for your case
Ie you need class name for GMapsID div?
And suffix to distinguish that divs on, for example, different pages.
Ie if you create map in page 1, you can specify suffix "map1" and get class="gm-map1"
and for second suffix "the-other-map" you want to get class="gm-the-other-map"
Sorry for late reply. I didn't mean that. I just want to assign predefined module styles to this module as I have many modules on every page and I want to be styled the same as other modules. All modules with which I'm working has Module Class Suffix parameter usually in Advanced options. I like to add predefined styles like: box1, roundedcorner, shadow1 etc.