Filemaker Go does not do native bar code scanning as far as I know.
You'll need to look into using an external "helper app". Skeleton key outlines this method here:
oh, and I forgot to mention CNSBarcode is a great app, I've used it and can vouch it's worth the price (a measly $9.99) .
There are many Bluetooth Bar Code Scanners that work well with FMGo. As long as it emulates the keyboard it will work with FMGo.
Keeping it in the family, FBA company ZeroBlue sells several.
Some potential issues:
1. Bluetooth doesn't have a long range. You should keep the Scanner within 6 feet of the iPad.
2. Your solution will probably use script triggers to know when a value has been entered. Make sure there is at least one field that allows entry after the Bar Code field or the script trigger may not work as desired.
3. I used an "On Field Entry" script trigger on the field after the bar code field (Do Not use "On Field Modify") so I was sure to always get the full scan. The scan should be set to end in a tab or return so it advances to the next field only at end of scan.
yowch those are pricey. That is an option though.