The attached PAC Control Basic 8.0 chart (can be imported into any 8.0 basic or better strategy) to parse GPS data on a RS-232 port. It shows how to make use of the EOM (end of message) character when receiving strings using a communication handle, and a couple of ways to parse data in a string table.
When there's a LOT of data to be received/parsed, I like to write it to a temporary file then search through the file, as show in this example.
Also see this thread for more on RS-232 comm handle usage.
p.s. This data coming in looks something like this:
This website was helpful for decoding: http://aprs.gids.nl/nmea/#gga
GPSChartv1_0.zip (3.5 KB)