There is not a way to suppress the keyboard. Other user have created their own calendar. Here is a post from the Filemaker Go forum, where PhilModJunk placed a link for a popover calendar he created. Filemaker go Date picker not showing up? . Using FileMaker Pro . Forum . FileMaker Forums
schamblee is right- you cannot suppress the keyboard. I did the same type of solution mentioned with the popover calendar- using this to start with: http://www.modularfilemaker.org/module/monthpicker-v2-0/ and http://www.modularfilemaker.org/module/monthdatepicker/
The technique works great, and is much nicer than using the standard iOS options. I modified mine to have larger buttons so as to be easier to interact with on the iPad. I also use a similar technique with numeric fields where I want a mini-calculator to show up. The only draw back with these is to keep in mind that you cannot have a popover in a popover. So if the field you are trying to fill is already in a popover- you'll need to figure out how to pass the field/pick values back and forth across different popovers.
Excellent! Thank you padaddy for directing me to MonthPicker and THANK YOU, Todd Geist, for sharing this tool!