Gadu Gadu security

As far as I know there are no specific risks you're running nor special security options.

Note: At this time, there are two vulnerabilities, rated high and moderate, reported for Gasdu-Gadu, both not patched. They probably will not be patched, since these vulnerabilities were discovered a year ago and nothing has been done. To view a history of vulnerabilites, patched and unpatched, go here