I do not think the module will be damage by the signal from GSM module, but link can be reduced If used a t the same time. I guess you can control this in the application and ensure not GSM and Radiocrafts operation at the same time. Antenna will not filter much on the GSM signal if the GSM operate at 1800 MHz. You might look into use a 2.4 GHz SAW filter for better filtering. Your functional testing will decide if needed.
Last Update: August 8, 2017