The source code can be found in SVN, module base/gpesyncd.
Distributions known to ship gpesyncd are:
gpesyncd is distributed under the GPL.
gpesyncd is used to export and import PIM data either to stdout or over tcp/ip.
The gpesyncd can also be seen as a frontend to the libgpevtype which does all the conversion. Through this new fields in the PIM data can easily be added for ex- and importing and the results are the same as with exporting from gpe-calendar, gpe-todo etc.
You can also use it as a command line tool to access all the PIM data.
gpesyncd --help or enter