ENSAR2 is the integrating activity for European nuclear scientists who are performing research in three of the major subfields defined by NuPECC: Nuclear Structure and Dynamics, Nuclear Astrophysics and Nuclear Physics Tools and Applications. Within ENSAR2, GDS, the Gas-Filled Detectors and Systems Network Activity, gathers experts of gas-filled detectors and systems to develop new techniques to overcome constraints such as high-intensity beams and strong non-uniform magnetic fields. GDS announces the first of its four Topical Meetings: GDS coupling to auxiliary detection systems. This meeting is devoted to Ancillary detectors to be used in combination with GDS. Topics like particle, gamma-ray and neutron detectors will be covered, together with the associated electronics readout systems, complex simulation environments and integration issues.