These Multi GR4 cloning remotes can only copy any fixed code remote operating from 300Mhz to 868Mhz remote controls. To check you remote open up the case to see if it has DIP switches as shown below.

Your remote Should have between 8 and 12 switches inside that look similar to those shown above. The Multi GR4 can assign up to 4 different channels to the 4 buttons. I.e. up to 4 garage door or gate receivers.
This remote is not compatible with rolling code or code hopping technologies.